Numbers / 745

The Number 745

745 is composite: factorization 5 × 149. That gives 745 exactly 4 divisors: 1, 5, 149, 745. 745's proper divisors total just 155, 590 short of 745, the deficient case most of 745's neighbors share too. 745 has a digit sum of 16; for 745, the digital root works out to 7. 745: 5 all divide 745 evenly, out of 2-12. 745 is 1011101001 in binary and 2E9 in hex; as a Roman numeral it's DCCXLV.