23056440 has 64 divisors (see below), whose sum is σ = 75461760. Its totient is φ = 5589120.

The previous prime is 23056417. The next prime is 23056441. The reversal of 23056440 is 4465032.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 23056440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23056441) 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 15 ways as a sum of consecutive naturals, for example, 7414 + ... + 10053.

It is an arithmetic number, because the mean of its divisors is an integer number (1179090).

Almost surely, 2^23056440 is an apocalyptic number.

23056440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23056440 is an abundant number, since it is smaller than the sum of its proper divisors (52405320).

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

23056440 is a wasteful number, since it uses less digits than its factorization.

23056440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17492 (or 17488 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 23056440 is about 4801.7121946239. The cubic root of 23056440 is about 284.6191280435.

The spelling of 23056440 in words is "twenty-three million, fifty-six thousand, four hundred forty".