22855728 has 40 divisors (see below), whose sum is σ = 67479808. Its totient is φ = 6530112.

The previous prime is 22855709. The next prime is 22855757. The reversal of 22855728 is 82755822.

It is a happy 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, 33676 + ... + 34347.

Almost surely, 2^22855728 is an apocalyptic number.

22855728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22855728 is an abundant number, since it is smaller than the sum of its proper divisors (44624080).

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

22855728 is a wasteful number, since it uses less digits than its factorization.

22855728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68041 (or 68035 counting only the distinct ones).

The product of its digits is 89600, while the sum is 39.

The square root of 22855728 is about 4780.7664657458. The cubic root of 22855728 is about 283.7908266017.

The spelling of 22855728 in words is "twenty-two million, eight hundred fifty-five thousand, seven hundred twenty-eight".