Numbers / 722

The Number 722

722 is composite: factorization 2 × 19^2. That gives 722 exactly 6 divisors: 1, 2, 19, 38, 361, 722. 722's proper divisors total just 421, 301 short of 722, the deficient case most of 722's neighbors share too. 722 has a digit sum of 11; for 722, the digital root works out to 2. 722: 2 all divide 722 evenly, out of 2-12. 722 is 1011010010 in binary and 2D2 in hex; as a Roman numeral it's DCCXXII.