113665128 has 32 divisors (see below), whose sum is σ = 300879360. Its totient is φ = 35659520.

The previous prime is 113665117. The next prime is 113665141. The reversal of 113665128 is 821566311.

It is a super-2 number, since 2×113665128² = 25839522646512768, which contains 22 as substring.

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, 138888 + ... + 139703.

It is an arithmetic number, because the mean of its divisors is an integer number (9402480).

Almost surely, 2^113665128 is an apocalyptic number.

It is an amenable number.

113665128 is an abundant number, since it is smaller than the sum of its proper divisors (187214232).

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

113665128 is a wasteful number, since it uses less digits than its factorization.

113665128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278617 (or 278613 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 113665128 is about 10661.3849006590. The cubic root of 113665128 is about 484.4055181216.

The spelling of 113665128 in words is "one hundred thirteen million, six hundred sixty-five thousand, one hundred twenty-eight".