40 (number)

Last updated
39 40 41
Cardinal forty
Ordinal 40th
(fortieth)
Numeral system quadragesimal
Factorization 23 × 5
Divisors 1, 2, 4, 5, 8, 10, 20, 40
Greek numeral Μ´
Roman numeral XL, xl
Latin prefix quadrage-
Binary 1010002
Ternary 11113
Senary 1046
Octal 508
Duodecimal 3412
Hexadecimal 2816
Armenian Խ
Hebrew מ / ם
Babylonian numeral 𒐏
Egyptian hieroglyph 𓎉

40 (forty) is the natural number following 39 and preceding 41.

Contents

Though the word is related to four (4), the spelling forty replaced fourty during the 17th century [1] [2] and is now the standard form.

Mathematics

40 is an abundant number. [3]

Swiss mathematician Leonhard Euler noted 40 prime numbers generated by the quadratic polynomial , with values . These forty prime numbers are the same prime numbers that are generated using the polynomial with values of from 1 through 40, and are also known in this context as Euler's "lucky" numbers. [4]

In religion

The number 40 is found in many traditions without any universal explanation for its use. In Jewish, Christian, Islamic, and other Middle Eastern traditions it is taken to represent a large, approximate number, similar to "umpteen".

Sumerian

Enki ( /ˈɛŋki/) or Enkil (Sumerian: dEN.KI(G)𒂗𒆠) is a god in Sumerian mythology, later known as Ea in Akkadian and Babylonian mythology. He was originally patron god of the city of Eridu, but later the influence of his cult spread throughout Mesopotamia and to the Canaanites, Hittites and Hurrians. He was the deity of crafts (gašam); mischief; water, seawater, lake water (a, aba, ab), intelligence (gestú, literally "ear") and creation (Nudimmud: nu, likeness, dim mud, make bear). He was associated with the southern band of constellations called stars of Ea, but also with the constellation AŠ-IKU, the Field (Square of Pegasus). Beginning around the second millennium BCE, he was sometimes referred to in writing by the numeric ideogram for "40", occasionally referred to as his "sacred number".

Judaism

  1. He went up on the seventh day of Sivan, after God gave the Torah to the Jewish people, in order to learn the Torah from God, and came down on the seventeenth day of Tammuz, when he saw the Jews worshiping the Golden Calf and broke the tablets (Deuteronomy 9:11).
  2. He went up on the eighteenth day of Tammuz to beg forgiveness for the people's sin and came down without God's atonement on the twenty-ninth day of Av (Deuteronomy 9:25).
  3. He went up on the first day of Elul and came down on the tenth day of Tishrei, the first Yom Kippur, with God's atonement (Deuteronomy 10:10).

Islam

Hinduism

In Hinduism, some popular religious prayers consist of forty shlokas or dohas (couplets, stanzas). The most common being the Hanuman Chalisa (chaalis is the Hindi term for 40).

In the Hindu system some of the popular fasting periods consist 40 days and is called the period One 'Mandala Kalam' Kalam means a period and Mandala Kalam means a period of 40 days. For example, the devotees (male and female) of Swami Ayyappa, the name of a Hindu god very popular in Kerala, India (Sabarimala Swami Ayyappan) strictly observed forty days fasting and visit (since female devotees of a certain biological age group would not be able to perform the continuous 40-day-austerities, they would not enter into the god's temple until September 2018) with their holy submission or offerings on 41st or a convenient day after a minimum 40 days practice of fasting. The offering is called "Kaanikka".

In other fields

Forty is also:

References

  1. Google nGrams
  2. Oxford English Dictionary , 1st edition, s.v.
  3. Sloane, N. J. A. (ed.). "SequenceA005101(abundant numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  4. Euler, Leonhard (1772). Extrait d'un lettre de M. Euler le pere à M. Bernoulli concernant le Mémoire imprimé parmi ceux de 1771 (Extract of a letter). Nouveaux Mémoires de l'Académie Royale des Sciences de Berlin (in French). University of the Pacific (The Euler Archive). pp. 35, 36.
  5. Michael David Coogan, A Brief Introduction to the Old Testament: The Hebrew Bible in Its Context, Oxford, 2008, p. 116
  6. "Flogging".
  7. Koran Al-Ahqaf:15

Further reading