Numbers / 630

The Number 630

630 is composite: factorization 2 × 3^2 × 5 × 7. That gives 630 exactly 24 divisors: 1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 30, 35, 42, 45, 63, 70, 90, 105, 126, 210, 315, 630. 630's proper divisors total 1242, 612 more than 630 itself, so 630 is abundant. 630 is also the 35th triangular number, the sum of 1 through 35. 630 has a digit sum of 9; for 630, the digital root works out to 9. 630: 2, 3, 5, 6, 7, 9, 10 all divide 630 evenly, out of 2-12. 630 is 1001110110 in binary and 276 in hex; as a Roman numeral it's DCXXX.