Numbers / 388

The Number 388

388 is composite: factorization 2^2 × 97. That gives 388 exactly 6 divisors: 1, 2, 4, 97, 194, 388. 388's proper divisors total just 298, 90 short of 388, the deficient case most of 388's neighbors share too. 388 has a digit sum of 19; for 388, the digital root works out to 1. 388: 2, 4 all divide 388 evenly, out of 2-12. 388 is 110000100 in binary and 184 in hex; as a Roman numeral it's CCCLXXXVIII.