634822656 has 112 divisors (see below), whose sum is σ = 1823886624. Its totient is φ = 195231744.

The previous prime is 634822613. The next prime is 634822667. The reversal of 634822656 is 656228436.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318495 + ... + 320481.

It is an arithmetic number, because the mean of its divisors is an integer number (16284702).

Almost surely, 2^634822656 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 634822656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911943312).

634822656 is an abundant number, since it is smaller than the sum of its proper divisors (1189063968).

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

634822656 is a wasteful number, since it uses less digits than its factorization.

634822656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029 (or 2005 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 634822656 is about 25195.6872500037. The cubic root of 634822656 is about 859.4437795063.

The spelling of 634822656 in words is "six hundred thirty-four million, eight hundred twenty-two thousand, six hundred fifty-six".