22404004 has 12 divisors (see below), whose sum is σ = 44808064. Its totient is φ = 9601704.

The previous prime is 22403987. The next prime is 22404061. The reversal of 22404004 is 40040422.

22404004 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400044 + ... + 400099.

Almost surely, 2^22404004 is an apocalyptic number.

It is an amenable number.

22404004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22404004 is a wasteful number, since it uses less digits than its factorization.

22404004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800154 (or 800152 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 22404004 is about 4733.2868072831. The cubic root of 22404004 is about 281.9087443439.

Adding to 22404004 its reverse (40040422), we get a palindrome (62444426).

The spelling of 22404004 in words is "twenty-two million, four hundred four thousand, four".