Numbers / 424

The Number 424

424 is composite: factorization 2^3 × 53. That gives 424 exactly 8 divisors: 1, 2, 4, 8, 53, 106, 212, 424. 424's proper divisors total just 386, 38 short of 424, the deficient case most of 424's neighbors share too. 424 is also a palindrome, since 424 reads identically forwards and backwards. 424 has a digit sum of 10; for 424, the digital root works out to 1. 424: 2, 4, 8 all divide 424 evenly, out of 2-12. 424 is 110101000 in binary and 1A8 in hex; as a Roman numeral it's CDXXIV.