Numbers / 849

The Number 849

849 is composite: factorization 3 × 283. That gives 849 exactly 4 divisors: 1, 3, 283, 849. 849's proper divisors total just 287, 562 short of 849, the deficient case most of 849's neighbors share too. 849 has a digit sum of 21; for 849, the digital root works out to 3. 849: 3 all divide 849 evenly, out of 2-12. 849 is 1101010001 in binary and 351 in hex; as a Roman numeral it's DCCCXLIX.