22636228 has 6 divisors (see below), whose sum is σ = 39613406. Its totient is φ = 11318112.

The previous prime is 22636219. The next prime is 22636241. The reversal of 22636228 is 82263622.

It can be written as a sum of positive squares in only one way, i.e., 18507204 + 4129024 = 4302^2 + 2032^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22636228.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2829525 + ... + 2829532.

Almost surely, 2^22636228 is an apocalyptic number.

It is an amenable number.

22636228 is a deficient number, since it is larger than the sum of its proper divisors (16977178).

22636228 is a wasteful number, since it uses less digits than its factorization.

22636228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5659061 (or 5659059 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 22636228 is about 4757.7545123724. The cubic root of 22636228 is about 282.8794202189.

The spelling of 22636228 in words is "twenty-two million, six hundred thirty-six thousand, two hundred twenty-eight".