Numbers / 540

The Number 540

540 is composite: factorization 2^2 × 3^3 × 5. That gives 540 exactly 24 divisors: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 135, 180, 270, 540. 540's proper divisors total 1140, 600 more than 540 itself, so 540 is abundant. 540 has a digit sum of 9; for 540, the digital root works out to 9. 540: 2, 3, 4, 5, 6, 9, 10, 12 all divide 540 evenly, out of 2-12. 540 is 1000011100 in binary and 21C in hex; as a Roman numeral it's DXL.