22664928 has 144 divisors (see below), whose sum is σ = 70834176. Its totient is φ = 6289920.

The previous prime is 22664899. The next prime is 22664933. The reversal of 22664928 is 82946622.

It is a super-2 number, since 2×22664928² = 1027397922490368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 178401 + ... + 178527.

It is an arithmetic number, because the mean of its divisors is an integer number (491904).

Almost surely, 2^22664928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22664928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35417088).

22664928 is an abundant number, since it is smaller than the sum of its proper divisors (48169248).

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

22664928 is a wasteful number, since it uses less digits than its factorization.

22664928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 156 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 22664928 is about 4760.7696856706. The cubic root of 22664928 is about 282.9989220285.

The spelling of 22664928 in words is "twenty-two million, six hundred sixty-four thousand, nine hundred twenty-eight".