Numbers / 440
The Number 440
440 is composite: factorization 2^3 × 5 × 11. That gives 440 exactly 16 divisors: 1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440. 440's proper divisors total 640, 200 more than 440 itself, so 440 is abundant. 440 has a digit sum of 8; for 440, the digital root works out to 8. 440: 2, 4, 5, 8, 10, 11 all divide 440 evenly, out of 2-12. 440 is 110111000 in binary and 1B8 in hex; as a Roman numeral it's CDXL.