22690404 has 54 divisors (see below), whose sum is σ = 63056630. Its totient is φ = 6874560.

The previous prime is 22690387. The next prime is 22690411. The reversal of 22690404 is 40409622.

It can be written as a sum of positive squares in only one way, i.e., 22581504 + 108900 = 4752^2 + 330^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1752 + ... + 6960.

Almost surely, 2^22690404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22690404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31528315).

22690404 is an abundant number, since it is smaller than the sum of its proper divisors (40366226).

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

22690404 is a wasteful number, since it uses less digits than its factorization.

22690404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241 (or 5225 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 22690404 is about 4763.4445520023. Note that the first 3 decimals coincide. The cubic root of 22690404 is about 283.1049151724.

The spelling of 22690404 in words is "twenty-two million, six hundred ninety thousand, four hundred four".