22920428 has 12 divisors (see below), whose sum is σ = 40619040. Its totient is φ = 11314992.

The previous prime is 22920409. The next prime is 22920431. The reversal of 22920428 is 82402922.

It is a self number, because there is not a number n which added to its sum of digits gives 22920428.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35951 + ... + 36582.

It is an arithmetic number, because the mean of its divisors is an integer number (3384920).

Almost surely, 2^22920428 is an apocalyptic number.

It is an amenable number.

22920428 is a deficient number, since it is larger than the sum of its proper divisors (17698612).

22920428 is a wasteful number, since it uses less digits than its factorization.

22920428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72616 (or 72614 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 22920428 is about 4787.5283811169. The cubic root of 22920428 is about 284.0583593618.

The spelling of 22920428 in words is "twenty-two million, nine hundred twenty thousand, four hundred twenty-eight".