Numbers / 422

The Number 422

422 is composite: factorization 2 × 211. That gives 422 exactly 4 divisors: 1, 2, 211, 422. 422's proper divisors total just 214, 208 short of 422, the deficient case most of 422's neighbors share too. 422 has a digit sum of 8; for 422, the digital root works out to 8. 422: 2 all divide 422 evenly, out of 2-12. 422 is 110100110 in binary and 1A6 in hex; as a Roman numeral it's CDXXII.