Numbers / 411

The Number 411

411 is composite: factorization 3 × 137. That gives 411 exactly 4 divisors: 1, 3, 137, 411. 411's proper divisors total just 141, 270 short of 411, the deficient case most of 411's neighbors share too. 411 has a digit sum of 6; for 411, the digital root works out to 6. 411: 3 all divide 411 evenly, out of 2-12. 411 is 110011011 in binary and 19B in hex; as a Roman numeral it's CDXI.