Numbers / 980

The Number 980

980 is composite: factorization 2^2 × 5 × 7^2. That gives 980 exactly 18 divisors: 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980. 980's proper divisors total 1414, 434 more than 980 itself, so 980 is abundant. 980 has a digit sum of 17; for 980, the digital root works out to 8. 980: 2, 4, 5, 7, 10 all divide 980 evenly, out of 2-12. 980 is 1111010100 in binary and 3D4 in hex; as a Roman numeral it's CMLXXX.