Numbers / 340

The Number 340

340 is composite: factorization 2^2 × 5 × 17. That gives 340 exactly 12 divisors: 1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340. 340's proper divisors total 416, 76 more than 340 itself, so 340 is abundant. 340 has a digit sum of 7; for 340, the digital root works out to 7. 340: 2, 4, 5, 10 all divide 340 evenly, out of 2-12. 340 is 101010100 in binary and 154 in hex; as a Roman numeral it's CCCXL.