Numbers / 650

The Number 650

650 is composite: factorization 2 × 5^2 × 13. That gives 650 exactly 12 divisors: 1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 325, 650. 650's proper divisors total 652, 2 more than 650 itself, so 650 is abundant. 650 has a digit sum of 11; for 650, the digital root works out to 2. 650: 2, 5, 10 all divide 650 evenly, out of 2-12. 650 is 1010001010 in binary and 28A in hex; as a Roman numeral it's DCL.