Numbers / 130

The Number 130

130 is composite: factorization 2 × 5 × 13. That gives 130 exactly 8 divisors: 1, 2, 5, 10, 13, 26, 65, 130. 130's proper divisors total just 122, 8 short of 130, the deficient case most of 130's neighbors share too. 130 has a digit sum of 4; for 130, the digital root works out to 4. 130: 2, 5, 10 all divide 130 evenly, out of 2-12. 130 is 10000010 in binary and 82 in hex; as a Roman numeral it's CXXX.