22538402 has 16 divisors (see below), whose sum is σ = 35297592. Its totient is φ = 10782720.

The previous prime is 22538381. The next prime is 22538431. The reversal of 22538402 is 20483522.

It can be written as a sum of positive squares in 4 ways, for example, as 16491721 + 6046681 = 4061^2 + 2459^2 .

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 7 ways as a sum of consecutive naturals, for example, 2018 + ... + 7010.

Almost surely, 2^22538402 is an apocalyptic number.

22538402 is a deficient number, since it is larger than the sum of its proper divisors (12759190).

22538402 is a wasteful number, since it uses less digits than its factorization.

22538402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5093.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 22538402 is about 4747.4626907433. The cubic root of 22538402 is about 282.4713292228.

The spelling of 22538402 in words is "twenty-two million, five hundred thirty-eight thousand, four hundred two".