22404512 has 24 divisors (see below), whose sum is σ = 47502756. Its totient is φ = 10340352.

The previous prime is 22404497. The next prime is 22404523. The reversal of 22404512 is 21540422.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20106256 + 2298256 = 4484^2 + 1516^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26513 + ... + 27344.

Almost surely, 2^22404512 is an apocalyptic number.

It is an amenable number.

22404512 is an abundant number, since it is smaller than the sum of its proper divisors (25098244).

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

22404512 is a wasteful number, since it uses less digits than its factorization.

22404512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53880 (or 53872 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 22404512 is about 4733.3404694782. The cubic root of 22404512 is about 281.9108750428.

Adding to 22404512 its reverse (21540422), we get a palindrome (43944934).

The spelling of 22404512 in words is "twenty-two million, four hundred four thousand, five hundred twelve".