22521928 has 32 divisors (see below), whose sum is σ = 49613760. Its totient is φ = 9449280.

The previous prime is 22521901. The next prime is 22521931. The reversal of 22521928 is 82912522.

It is a self number, because there is not a number n which added to its sum of digits gives 22521928.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8700 + ... + 10987.

It is an arithmetic number, because the mean of its divisors is an integer number (1550430).

Almost surely, 2^22521928 is an apocalyptic number.

It is an amenable number.

22521928 is an abundant number, since it is smaller than the sum of its proper divisors (27091832).

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

22521928 is a wasteful number, since it uses less digits than its factorization.

22521928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19717 (or 19713 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 22521928 is about 4745.7273415147. The cubic root of 22521928 is about 282.4024901674.

The spelling of 22521928 in words is "twenty-two million, five hundred twenty-one thousand, nine hundred twenty-eight".