Numbers / 459

The Number 459

459 is composite: factorization 3^3 × 17. That gives 459 exactly 8 divisors: 1, 3, 9, 17, 27, 51, 153, 459. 459's proper divisors total just 261, 198 short of 459, the deficient case most of 459's neighbors share too. 459 has a digit sum of 18; for 459, the digital root works out to 9. 459: 3, 9 all divide 459 evenly, out of 2-12. 459 is 111001011 in binary and 1CB in hex; as a Roman numeral it's CDLIX.