Numbers / 779

The Number 779

779 is composite: factorization 19 × 41. That gives 779 exactly 4 divisors: 1, 19, 41, 779. 779's proper divisors total just 61, 718 short of 779, the deficient case most of 779's neighbors share too. 779 has a digit sum of 23; for 779, the digital root works out to 5. 779 shares no factor with 2-12; 779's own divisors start beyond that range. 779 is 1100001011 in binary and 30B in hex; as a Roman numeral it's DCCLXXIX.