23215638 has 16 divisors (see below), whose sum is σ = 46642176. Its totient is φ = 7703400.

The previous prime is 23215597. The next prime is 23215667. The reversal of 23215638 is 83651232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7338 + ... + 10013.

It is an arithmetic number, because the mean of its divisors is an integer number (2915136).

Almost surely, 2^23215638 is an apocalyptic number.

23215638 is an abundant number, since it is smaller than the sum of its proper divisors (23426538).

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

23215638 is a wasteful number, since it uses less digits than its factorization.

23215638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17579.

The product of its digits is 8640, while the sum is 30.

The square root of 23215638 is about 4818.2608895742. The cubic root of 23215638 is about 285.2726968252.

The spelling of 23215638 in words is "twenty-three million, two hundred fifteen thousand, six hundred thirty-eight".