Numbers / 870

The Number 870

870 is composite: factorization 2 × 3 × 5 × 29. That gives 870 exactly 16 divisors: 1, 2, 3, 5, 6, 10, 15, 29, 30, 58, 87, 145, 174, 290, 435, 870. 870's proper divisors total 1290, 420 more than 870 itself, so 870 is abundant. 870 has a digit sum of 15; for 870, the digital root works out to 6. 870: 2, 3, 5, 6, 10 all divide 870 evenly, out of 2-12. 870 is 1101100110 in binary and 366 in hex; as a Roman numeral it's DCCCLXX.