22199928 has 16 divisors (see below), whose sum is σ = 55499880. Its totient is φ = 7399968.

The previous prime is 22199887. The next prime is 22199929. The reversal of 22199928 is 82999122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22199928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22199929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462475 + ... + 462522.

Almost surely, 2^22199928 is an apocalyptic number.

It is an amenable number.

22199928 is an abundant number, since it is smaller than the sum of its proper divisors (33299952).

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

22199928 is a wasteful number, since it uses less digits than its factorization.

22199928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925006 (or 925002 counting only the distinct ones).

The product of its digits is 46656, while the sum is 42.

The square root of 22199928 is about 4711.6799551752. The cubic root of 22199928 is about 281.0501719324.

The spelling of 22199928 in words is "twenty-two million, one hundred ninety-nine thousand, nine hundred twenty-eight".