634812388 has 48 divisors (see below), whose sum is σ = 1298304000. Its totient is φ = 265969440.

The previous prime is 634812377. The next prime is 634812391. The reversal of 634812388 is 883218436.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327783 + ... + 329713.

It is an arithmetic number, because the mean of its divisors is an integer number (27048000).

Almost surely, 2^634812388 is an apocalyptic number.

It is an amenable number.

634812388 is an abundant number, since it is smaller than the sum of its proper divisors (663491612).

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

634812388 is a wasteful number, since it uses less digits than its factorization.

634812388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200 (or 2198 counting only the distinct ones).

The product of its digits is 221184, while the sum is 43.

The square root of 634812388 is about 25195.4834841485. The cubic root of 634812388 is about 859.4391457626.

The spelling of 634812388 in words is "six hundred thirty-four million, eight hundred twelve thousand, three hundred eighty-eight".