Mathematics
138 is a sphenic number, [1] an Ulam number, [2] an abundant number, [3] and a square-free congruent number. [4]
| ||||
|---|---|---|---|---|
| Cardinal | one hundred thirty-eight | |||
| Ordinal | 138th (one hundred thirty-eighth) | |||
| Factorization | 2 × 3 × 23 | |||
| Divisors | 1, 2, 3, 6, 23, 46, 69, 138 | |||
| Greek numeral | ΡΛΗ´ | |||
| Roman numeral | CXXXVIII | |||
| Binary | 100010102 | |||
| Ternary | 120103 | |||
| Senary | 3506 | |||
| Octal | 2128 | |||
| Duodecimal | B612 | |||
| Hexadecimal | 8A16 | |||
138 (one hundred [and] thirty-eight) is the natural number following 137 and preceding 139.
138 is a sphenic number, [1] an Ulam number, [2] an abundant number, [3] and a square-free congruent number. [4]
78 (seventy-eight) is the natural number following 77 and preceding 79.
70 (seventy) is the natural number following 69 and preceding 71.
29 (twenty-nine) is the natural number following 28 and preceding 30. It is a prime number.
69 is the natural number following 68 and preceding 70. An odd number and a composite number, 69 is divisible by 1, 3, 23 and 69.
72 (seventy-two) is the natural number following 71 and preceding 73. It is half a gross or six dozen.
114 is the natural number following 113 and preceding 115.
300 is the natural number following 299 and preceding 301.
360 is the natural number following 359 and preceding 361.
400 is the natural number following 399 and preceding 401.
500 is the natural number following 499 and preceding 501.
700 is the natural number following 699 and preceding 701.
600 is the natural number following 599 and preceding 601.
800 is the natural number following 799 and preceding 801.
900 is the natural number following 899 and preceding 901. It is the square of 30 and the sum of Euler's totient function for the first 54 positive integers. In base 10, it is a Harshad number. It is also the first number to be the square of a sphenic number.
3000 is the natural number following 2999 and preceding 3001. It is the smallest number requiring thirteen letters in English.
777 is the natural number following 776 and preceding 778. The number 777 is significant in numerous religious and political contexts.
182 is the natural number following 181 and preceding 183.
258 is the natural number following 257 and preceding 259.
70,000 is the natural number that comes after 69,999 and before 70,001. It is a round number.
840 is the natural number following 839 and preceding 841.