Numbers / 154

The Number 154

154 is composite: factorization 2 × 7 × 11. That gives 154 exactly 8 divisors: 1, 2, 7, 11, 14, 22, 77, 154. 154's proper divisors total just 134, 20 short of 154, the deficient case most of 154's neighbors share too. 154 has a digit sum of 10; for 154, the digital root works out to 1. 154: 2, 7, 11 all divide 154 evenly, out of 2-12. 154 is 10011010 in binary and 9A in hex; as a Roman numeral it's CLIV.