Numbers / 495

The Number 495

495 is composite: factorization 3^2 × 5 × 11. That gives 495 exactly 12 divisors: 1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495. 495's proper divisors total just 441, 54 short of 495, the deficient case most of 495's neighbors share too. 495 has a digit sum of 18; for 495, the digital root works out to 9. 495: 3, 5, 9, 11 all divide 495 evenly, out of 2-12. 495 is 111101111 in binary and 1EF in hex; as a Roman numeral it's CDXCV.