Numbers / 715

The Number 715

715 is composite: factorization 5 × 11 × 13. That gives 715 exactly 8 divisors: 1, 5, 11, 13, 55, 65, 143, 715. 715's proper divisors total just 293, 422 short of 715, the deficient case most of 715's neighbors share too. 715 has a digit sum of 13; for 715, the digital root works out to 4. 715: 5, 11 all divide 715 evenly, out of 2-12. 715 is 1011001011 in binary and 2CB in hex; as a Roman numeral it's DCCXV.