Numbers / 578

The Number 578

578 is composite: factorization 2 × 17^2. That gives 578 exactly 6 divisors: 1, 2, 17, 34, 289, 578. 578's proper divisors total just 343, 235 short of 578, the deficient case most of 578's neighbors share too. 578 has a digit sum of 20; for 578, the digital root works out to 2. 578: 2 all divide 578 evenly, out of 2-12. 578 is 1001000010 in binary and 242 in hex; as a Roman numeral it's DLXXVIII.