23565128 has 16 divisors (see below), whose sum is σ = 46783980. Its totient is φ = 11089408.

The previous prime is 23565121. The next prime is 23565137. The reversal of 23565128 is 82156532.

It can be written as a sum of positive squares in 2 ways, for example, as 19731364 + 3833764 = 4442^2 + 1958^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23565094 and 23565103.

It is not an unprimeable number, because it can be changed into a prime (23565121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86501 + ... + 86772.

Almost surely, 2^23565128 is an apocalyptic number.

It is an amenable number.

23565128 is a deficient number, since it is larger than the sum of its proper divisors (23218852).

23565128 is a wasteful number, since it uses less digits than its factorization.

23565128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173296 (or 173292 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 23565128 is about 4854.3926499615. The cubic root of 23565128 is about 286.6970786797.

The spelling of 23565128 in words is "twenty-three million, five hundred sixty-five thousand, one hundred twenty-eight".