Numbers / 395

The Number 395

395 is composite: factorization 5 × 79. That gives 395 exactly 4 divisors: 1, 5, 79, 395. 395's proper divisors total just 85, 310 short of 395, the deficient case most of 395's neighbors share too. 395 has a digit sum of 17; for 395, the digital root works out to 8. 395: 5 all divide 395 evenly, out of 2-12. 395 is 110001011 in binary and 18B in hex; as a Roman numeral it's CCCXCV.