22638884 has 6 divisors (see below), whose sum is σ = 39618054. Its totient is φ = 11319440.

The previous prime is 22638881. The next prime is 22638919. The reversal of 22638884 is 48883622.

It can be written as a sum of positive squares in only one way, i.e., 20448484 + 2190400 = 4522^2 + 1480^2 .

It is not an unprimeable number, because it can be changed into a prime (22638881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2829857 + ... + 2829864.

It is an arithmetic number, because the mean of its divisors is an integer number (6603009).

Almost surely, 2^22638884 is an apocalyptic number.

It is an amenable number.

22638884 is a deficient number, since it is larger than the sum of its proper divisors (16979170).

22638884 is a wasteful number, since it uses less digits than its factorization.

22638884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5659725 (or 5659723 counting only the distinct ones).

The product of its digits is 147456, while the sum is 41.

The square root of 22638884 is about 4758.0336274558. The cubic root of 22638884 is about 282.8904835809.

The spelling of 22638884 in words is "twenty-two million, six hundred thirty-eight thousand, eight hundred eighty-four".