Numbers / 867

The Number 867

867 is composite: factorization 3 × 17^2. That gives 867 exactly 6 divisors: 1, 3, 17, 51, 289, 867. 867's proper divisors total just 361, 506 short of 867, the deficient case most of 867's neighbors share too. 867 has a digit sum of 21; for 867, the digital root works out to 3. 867: 3 all divide 867 evenly, out of 2-12. 867 is 1101100011 in binary and 363 in hex; as a Roman numeral it's DCCCLXVII.