Numbers / 828

The Number 828

828 is composite: factorization 2^2 × 3^2 × 23. That gives 828 exactly 18 divisors: 1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 69, 92, 138, 207, 276, 414, 828. 828's proper divisors total 1356, 528 more than 828 itself, so 828 is abundant. 828 is also a palindrome, since 828 reads identically forwards and backwards. 828 has a digit sum of 18; for 828, the digital root works out to 9. 828: 2, 3, 4, 6, 9, 12 all divide 828 evenly, out of 2-12. 828 is 1100111100 in binary and 33C in hex; as a Roman numeral it's DCCCXXVIII.