86 (number)

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85 86 87
Cardinal eighty-six
Ordinal 86th
(eighty-sixth)
Factorization 2 × 43
Divisors 1, 2, 43, 86
Greek numeral ΠϚ´
Roman numeral LXXXVI
Binary 10101102
Ternary 100123
Senary 2226
Octal 1268
Duodecimal 7212
Hexadecimal 5616

86 (eighty-six) is the natural number following 85 and preceding 87.

Contents

In mathematics

86 is:

It appears in the Padovan sequence, preceded by the terms 37, 49, 65 (it is the sum of the first two of these). [8]

It is conjectured that 86 is the largest n for which the decimal expansion of 2n contains no 0. [9]

86 = (8 × 6 = 48) + (4 × 8 = 32) + (3 × 2 = 6). That is, 86 is equal to the sum of the numbers formed in calculating its multiplicative persistence.

In science

In other fields

See also

Notes

  1. Sloane, N. J. A. (ed.). "SequenceA005277(Nontotients)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  2. Sloane, N. J. A. (ed.). "SequenceA005278(Noncototients)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  3. Sloane, N. J. A. (ed.). "SequenceA006881(Squarefree semiprimes: Numbers that are the product of two distinct primes)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  4. Sloane, N. J. A. (ed.). "SequenceA056809(Numbers k such that k, k+1 and k+2 are products of two primes)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  5. Sloane, N. J. A. (ed.). "SequenceA059756(Erdős-Woods numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  6. Sloane, N. J. A. (ed.). "SequenceA007770(Happy numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  7. Sloane, N. J. A. (ed.). "SequenceA003052(Self numbers or Colombian numbers (numbers that are not of the form m + sum of digits of m for any m))". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  8. Sloane, N. J. A. (ed.). "SequenceA000931(Padovan sequence)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  9. Sloane, N. J. A. (ed.). "SequenceA007377(Numbers k such that the decimal expansion of 2^k contains no 0)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  10. "Where Did the Term 86 Come From?". www.mentalfloss.com. 2013-08-13. Retrieved 2021-10-30.

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