Numbers / 789

The Number 789

789 is composite: factorization 3 × 263. That gives 789 exactly 4 divisors: 1, 3, 263, 789. 789's proper divisors total just 267, 522 short of 789, the deficient case most of 789's neighbors share too. 789 has a digit sum of 24; for 789, the digital root works out to 6. 789: 3 all divide 789 evenly, out of 2-12. 789 is 1100010101 in binary and 315 in hex; as a Roman numeral it's DCCLXXXIX.