Numbers / 156

The Number 156

156 is composite: factorization 2^2 × 3 × 13. That gives 156 exactly 12 divisors: 1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156. 156's proper divisors total 236, 80 more than 156 itself, so 156 is abundant. 156 has a digit sum of 12; for 156, the digital root works out to 3. 156: 2, 3, 4, 6, 12 all divide 156 evenly, out of 2-12. 156 is 10011100 in binary and 9C in hex; as a Roman numeral it's CLVI.