23128656 has 20 divisors (see below), whose sum is σ = 59749152. Its totient is φ = 7709536.

The previous prime is 23128613. The next prime is 23128657. The reversal of 23128656 is 65682132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23128657) 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, 240876 + ... + 240971.

Almost surely, 2^23128656 is an apocalyptic number.

It is an amenable number.

23128656 is an abundant number, since it is smaller than the sum of its proper divisors (36620496).

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

23128656 is a wasteful number, since it uses less digits than its factorization.

23128656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481858 (or 481852 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 23128656 is about 4809.2261331736. The cubic root of 23128656 is about 284.9159739981.

The spelling of 23128656 in words is "twenty-three million, one hundred twenty-eight thousand, six hundred fifty-six".