23158564 has 24 divisors (see below), whose sum is σ = 47613888. Its totient is φ = 9716640.

The previous prime is 23158561. The next prime is 23158571. The reversal of 23158564 is 46585132.

It is not an unprimeable number, because it can be changed into a prime (23158561) 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, 19672 + ... + 20815.

It is an arithmetic number, because the mean of its divisors is an integer number (1983912).

Almost surely, 2^23158564 is an apocalyptic number.

It is an amenable number.

23158564 is an abundant number, since it is smaller than the sum of its proper divisors (24455324).

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

23158564 is a wasteful number, since it uses less digits than its factorization.

23158564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40515 (or 40513 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 23158564 is about 4812.3345685852. The cubic root of 23158564 is about 285.0387307577.

The spelling of 23158564 in words is "twenty-three million, one hundred fifty-eight thousand, five hundred sixty-four".