Numbers / 698

The Number 698

698 is composite: factorization 2 × 349. That gives 698 exactly 4 divisors: 1, 2, 349, 698. 698's proper divisors total just 352, 346 short of 698, the deficient case most of 698's neighbors share too. 698 has a digit sum of 23; for 698, the digital root works out to 5. 698: 2 all divide 698 evenly, out of 2-12. 698 is 1010111010 in binary and 2BA in hex; as a Roman numeral it's DCXCVIII.