23264440 has 32 divisors (see below), whose sum is σ = 52818480. Its totient is φ = 9221632.

The previous prime is 23264429. The next prime is 23264447. The reversal of 23264440 is 4446232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23264447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1947 + ... + 7093.

Almost surely, 2^23264440 is an apocalyptic number.

23264440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23264440 is an abundant number, since it is smaller than the sum of its proper divisors (29554040).

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

23264440 is a wasteful number, since it uses less digits than its factorization.

23264440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5271 (or 5267 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 23264440 is about 4823.3225063228. The cubic root of 23264440 is about 285.4724491701.

The spelling of 23264440 in words is "twenty-three million, two hundred sixty-four thousand, four hundred forty".