633856 has 22 divisors (see below), whose sum is σ = 1269140. Its totient is φ = 316416.

The previous prime is 633833. The next prime is 633877. The reversal of 633856 is 658336.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715 + ... + 1333.

2⁶³³⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 633856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (634570).

633856 is an abundant number, since it is smaller than the sum of its proper divisors (635284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

633856 is an equidigital number, since it uses as much as digits as its factorization.

633856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 621 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 633856 is about 796.1507394960. The cubic root of 633856 is about 85.9007327677.

The spelling of 633856 in words is "six hundred thirty-three thousand, eight hundred fifty-six".