Numbers / 512

The Number 512

512 is composite: factorization 2^9. That gives 512 exactly 10 divisors: 1, 2, 4, 8, 16, 32, 64, 128, 256, 512. 512's proper divisors total just 511, 1 short of 512, the deficient case most of 512's neighbors share too. 512 is also a perfect cube, since 8³ = 512. 512 has a digit sum of 8; for 512, the digital root works out to 8. 512: 2, 4, 8 all divide 512 evenly, out of 2-12. 512 is 1000000000 in binary and 200 in hex; as a Roman numeral it's DXII.