23656401 has 16 divisors (see below), whose sum is σ = 37108800. Its totient is φ = 14842944.

The previous prime is 23656363. The next prime is 23656447. The reversal of 23656401 is 10465632.

23656401 is a `hidden beast` number, since 2 + 3 + 656 + 4 + 0 + 1 = 666.

It is not a de Polignac number, because 23656401 - 2⁶ = 23656337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23656481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25311 + ... + 26228.

It is an arithmetic number, because the mean of its divisors is an integer number (2319300).

Almost surely, 2^23656401 is an apocalyptic number.

It is an amenable number.

23656401 is a deficient number, since it is larger than the sum of its proper divisors (13452399).

23656401 is a wasteful number, since it uses less digits than its factorization.

23656401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51565 (or 51559 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 23656401 is about 4863.7846375020. The cubic root of 23656401 is about 287.0667490746.

The spelling of 23656401 in words is "twenty-three million, six hundred fifty-six thousand, four hundred one".