23656428 has 24 divisors (see below), whose sum is σ = 61331760. Its totient is φ = 7885440.

The previous prime is 23656363. The next prime is 23656447. The reversal of 23656428 is 82465632.

23656428 is a `hidden beast` number, since 2 + 3 + 6 + 5 + 642 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 23656392 and 23656401.

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, 109413 + ... + 109628.

It is an arithmetic number, because the mean of its divisors is an integer number (2555490).

Almost surely, 2^23656428 is an apocalyptic number.

It is an amenable number.

23656428 is an abundant number, since it is smaller than the sum of its proper divisors (37675332).

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

23656428 is a wasteful number, since it uses less digits than its factorization.

23656428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219054 (or 219046 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 23656428 is about 4863.7874131175. The cubic root of 23656428 is about 287.0668582881.

The spelling of 23656428 in words is "twenty-three million, six hundred fifty-six thousand, four hundred twenty-eight".