Numbers / 256

The Number 256

256 is composite: factorization 2^8. That gives 256 exactly 9 divisors: 1, 2, 4, 8, 16, 32, 64, 128, 256. 256's proper divisors total just 255, 1 short of 256, the deficient case most of 256's neighbors share too. 256 is also a perfect square, since 16² = 256. 256 has a digit sum of 13; for 256, the digital root works out to 4. 256: 2, 4, 8 all divide 256 evenly, out of 2-12. 256 is 100000000 in binary and 100 in hex; as a Roman numeral it's CCLVI.