23164640 has 24 divisors (see below), whose sum is σ = 54726840. Its totient is φ = 9265792.

The previous prime is 23164637. The next prime is 23164643. The reversal of 23164640 is 4646132.

It is an interprime number because it is at equal distance from previous prime (23164637) and next prime (23164643).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23164643) 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, 72230 + ... + 72549.

It is an arithmetic number, because the mean of its divisors is an integer number (2280285).

Almost surely, 2^23164640 is an apocalyptic number.

23164640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23164640 is an abundant number, since it is smaller than the sum of its proper divisors (31562200).

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

23164640 is a wasteful number, since it uses less digits than its factorization.

23164640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144794 (or 144786 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 23164640 is about 4812.9658216115. The cubic root of 23164640 is about 285.0636566539.

The spelling of 23164640 in words is "twenty-three million, one hundred sixty-four thousand, six hundred forty".