Numbers / 654

The Number 654

654 is composite: factorization 2 × 3 × 109. That gives 654 exactly 8 divisors: 1, 2, 3, 6, 109, 218, 327, 654. 654's proper divisors total 666, 12 more than 654 itself, so 654 is abundant. 654 has a digit sum of 15; for 654, the digital root works out to 6. 654: 2, 3, 6 all divide 654 evenly, out of 2-12. 654 is 1010001110 in binary and 28E in hex; as a Roman numeral it's DCLIV.