Numbers / 864
The Number 864
864 is composite: factorization 2^5 × 3^3. That gives 864 exactly 24 divisors: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 32, 36, 48, 54, 72, 96, 108, 144, 216, 288, 432, 864. 864's proper divisors total 1656, 792 more than 864 itself, so 864 is abundant. 864 has a digit sum of 18; for 864, the digital root works out to 9. 864: 2, 3, 4, 6, 8, 9, 12 all divide 864 evenly, out of 2-12. 864 is 1101100000 in binary and 360 in hex; as a Roman numeral it's DCCCLXIV.