22640044 has 24 divisors (see below), whose sum is σ = 46742528. Its totient is φ = 9389520.

The previous prime is 22639987. The next prime is 22640053. The reversal of 22640044 is 44004622.

It is a junction number, because it is equal to n+sod(n) for n = 22639997 and 22640024.

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, 12174 + ... + 13909.

Almost surely, 2^22640044 is an apocalyptic number.

It is an amenable number.

22640044 is an abundant number, since it is smaller than the sum of its proper divisors (24102484).

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

22640044 is a wasteful number, since it uses less digits than its factorization.

22640044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26125 (or 26123 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 22640044 is about 4758.1555249908. The cubic root of 22640044 is about 282.8953151995.

Adding to 22640044 its reverse (44004622), we get a palindrome (66644666).

The spelling of 22640044 in words is "twenty-two million, six hundred forty thousand, forty-four".