Numbers / 724

The Number 724

724 is composite: factorization 2^2 × 181. That gives 724 exactly 6 divisors: 1, 2, 4, 181, 362, 724. 724's proper divisors total just 550, 174 short of 724, the deficient case most of 724's neighbors share too. 724 has a digit sum of 13; for 724, the digital root works out to 4. 724: 2, 4 all divide 724 evenly, out of 2-12. 724 is 1011010100 in binary and 2D4 in hex; as a Roman numeral it's DCCXXIV.