22921228 has 24 divisors (see below), whose sum is σ = 44588880. Its totient is φ = 10221120.

The previous prime is 22921211. The next prime is 22921231. The reversal of 22921228 is 82212922.

It is a junction number, because it is equal to n+sod(n) for n = 22921196 and 22921205.

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, 2583 + ... + 7246.

It is an arithmetic number, because the mean of its divisors is an integer number (1857870).

Almost surely, 2^22921228 is an apocalyptic number.

It is an amenable number.

22921228 is a deficient number, since it is larger than the sum of its proper divisors (21667652).

22921228 is a wasteful number, since it uses less digits than its factorization.

22921228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9897 (or 9895 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 22921228 is about 4787.6119308064. The cubic root of 22921228 is about 284.0616641872.

The spelling of 22921228 in words is "twenty-two million, nine hundred twenty-one thousand, two hundred twenty-eight".