Numbers / 290

The Number 290

290 is composite: factorization 2 × 5 × 29. That gives 290 exactly 8 divisors: 1, 2, 5, 10, 29, 58, 145, 290. 290's proper divisors total just 250, 40 short of 290, the deficient case most of 290's neighbors share too. 290 has a digit sum of 11; for 290, the digital root works out to 2. 290: 2, 5, 10 all divide 290 evenly, out of 2-12. 290 is 100100010 in binary and 122 in hex; as a Roman numeral it's CCXC.