496 (number)
Four hundred and ninety-six is the natural number following four hundred and ninety-five and preceding four hundred and ninety-seven. A triangular number and a hexagonal number, it is most notable for being a perfect number, and one of the earliest numbers to be recognized as such. As a perfect number, it is tied to the Mersenne prime 31, 25 - 1, with 24 ( 25 - 1 ) yielding 496. Also related to its being a perfect number, 496 is a harmonic divisor number, since 496 divided by the sum of the reciprocals of its divisors, 1, 2, 4, 8, 16, 31, 62, 124, 248 and 496, (the harmonic mean), yields an integer, 5 in this case.
| 496 | |
|---|---|
| Cardinal | 496 |
| Ordinal | 496th |
| Factorization | |
| Roman numeral | CDXCVI |
| Binary | 111110000 |
| Hexadecimal | 1F0 |
See also: four hundred
For the year AD, see 496.