Numbers / 858

The Number 858

858 is composite: factorization 2 × 3 × 11 × 13. That gives 858 exactly 16 divisors: 1, 2, 3, 6, 11, 13, 22, 26, 33, 39, 66, 78, 143, 286, 429, 858. 858's proper divisors total 1158, 300 more than 858 itself, so 858 is abundant. 858 is also a palindrome, since 858 reads identically forwards and backwards. 858 has a digit sum of 21; for 858, the digital root works out to 3. 858: 2, 3, 6, 11 all divide 858 evenly, out of 2-12. 858 is 1101011010 in binary and 35A in hex; as a Roman numeral it's DCCCLVIII.