Numbers / 530

The Number 530

530 is composite: factorization 2 × 5 × 53. That gives 530 exactly 8 divisors: 1, 2, 5, 10, 53, 106, 265, 530. 530's proper divisors total just 442, 88 short of 530, the deficient case most of 530's neighbors share too. 530 has a digit sum of 8; for 530, the digital root works out to 8. 530: 2, 5, 10 all divide 530 evenly, out of 2-12. 530 is 1000010010 in binary and 212 in hex; as a Roman numeral it's DXXX.