Numbers / 636

The Number 636

636 is composite: factorization 2^2 × 3 × 53. That gives 636 exactly 12 divisors: 1, 2, 3, 4, 6, 12, 53, 106, 159, 212, 318, 636. 636's proper divisors total 876, 240 more than 636 itself, so 636 is abundant. 636 is also a palindrome, since 636 reads identically forwards and backwards. 636 has a digit sum of 15; for 636, the digital root works out to 6. 636: 2, 3, 4, 6, 12 all divide 636 evenly, out of 2-12. 636 is 1001111100 in binary and 27C in hex; as a Roman numeral it's DCXXXVI.