Numbers / 620

The Number 620

620 is composite: factorization 2^2 × 5 × 31. That gives 620 exactly 12 divisors: 1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620. 620's proper divisors total 724, 104 more than 620 itself, so 620 is abundant. 620 has a digit sum of 8; for 620, the digital root works out to 8. 620: 2, 4, 5, 10 all divide 620 evenly, out of 2-12. 620 is 1001101100 in binary and 26C in hex; as a Roman numeral it's DCXX.