Numbers / 567

The Number 567

567 is composite: factorization 3^4 × 7. That gives 567 exactly 10 divisors: 1, 3, 7, 9, 21, 27, 63, 81, 189, 567. 567's proper divisors total just 401, 166 short of 567, the deficient case most of 567's neighbors share too. 567 has a digit sum of 18; for 567, the digital root works out to 9. 567: 3, 7, 9 all divide 567 evenly, out of 2-12. 567 is 1000110111 in binary and 237 in hex; as a Roman numeral it's DLXVII.