634801128 has 32 divisors (see below), whose sum is σ = 1709080800. Its totient is φ = 195323328.

The previous prime is 634801121. The next prime is 634801157. The reversal of 634801128 is 821108436.

It is a super-2 number, since 2×634801128² = 805944944220144768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (634801121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016998 + ... + 1017621.

It is an arithmetic number, because the mean of its divisors is an integer number (53408775).

Almost surely, 2^634801128 is an apocalyptic number.

It is an amenable number.

634801128 is an abundant number, since it is smaller than the sum of its proper divisors (1074279672).

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

634801128 is a wasteful number, since it uses less digits than its factorization.

634801128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034641 (or 2034637 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 634801128 is about 25195.2600304105. The cubic root of 634801128 is about 859.4340642918.

The spelling of 634801128 in words is "six hundred thirty-four million, eight hundred one thousand, one hundred twenty-eight".