23656040 has 32 divisors (see below), whose sum is σ = 54362880. Its totient is φ = 9260352.

The previous prime is 23656037. The next prime is 23656049. The reversal of 23656040 is 4065632.

It is not an unprimeable number, because it can be changed into a prime (23656049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4412 + ... + 8171.

It is an arithmetic number, because the mean of its divisors is an integer number (1698840).

Almost surely, 2^23656040 is an apocalyptic number.

23656040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23656040 is an abundant number, since it is smaller than the sum of its proper divisors (30706840).

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

23656040 is a wasteful number, since it uses less digits than its factorization.

23656040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12641 (or 12637 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 23656040 is about 4863.7475263422. The cubic root of 23656040 is about 287.0652888408.

The spelling of 23656040 in words is "twenty-three million, six hundred fifty-six thousand, forty".