Numbers / 465

The Number 465

465 is composite: factorization 3 × 5 × 31. That gives 465 exactly 8 divisors: 1, 3, 5, 15, 31, 93, 155, 465. 465's proper divisors total just 303, 162 short of 465, the deficient case most of 465's neighbors share too. 465 is also the 30th triangular number, the sum of 1 through 30. 465 has a digit sum of 15; for 465, the digital root works out to 6. 465: 3, 5 all divide 465 evenly, out of 2-12. 465 is 111010001 in binary and 1D1 in hex; as a Roman numeral it's CDLXV.