Numbers / 216

The Number 216

216 is composite: factorization 2^3 × 3^3. That gives 216 exactly 16 divisors: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 108, 216. 216's proper divisors total 384, 168 more than 216 itself, so 216 is abundant. 216 is also a perfect cube, since 6³ = 216. 216 has a digit sum of 9; for 216, the digital root works out to 9. 216: 2, 3, 4, 6, 8, 9, 12 all divide 216 evenly, out of 2-12. 216 is 11011000 in binary and D8 in hex; as a Roman numeral it's CCXVI.