22208404 has 6 divisors (see below), whose sum is σ = 38864714. Its totient is φ = 11104200.

The previous prime is 22208357. The next prime is 22208411. The reversal of 22208404 is 40480222.

It can be written as a sum of positive squares in only one way, i.e., 21715600 + 492804 = 4660^2 + 702^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2776047 + ... + 2776054.

Almost surely, 2^22208404 is an apocalyptic number.

It is an amenable number.

22208404 is a deficient number, since it is larger than the sum of its proper divisors (16656310).

22208404 is a wasteful number, since it uses less digits than its factorization.

22208404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552105 (or 5552103 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 22208404 is about 4712.5793362022. The cubic root of 22208404 is about 281.0859359845.

Adding to 22208404 its reverse (40480222), we get a palindrome (62688626).

The spelling of 22208404 in words is "twenty-two million, two hundred eight thousand, four hundred four".