22636638 has 32 divisors (see below), whose sum is σ = 52953600. Its totient is φ = 7148088.

The previous prime is 22636631. The next prime is 22636661. The reversal of 22636638 is 83663622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22636631) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10006 + ... + 12057.

It is an arithmetic number, because the mean of its divisors is an integer number (1654800).

Almost surely, 2^22636638 is an apocalyptic number.

22636638 is an abundant number, since it is smaller than the sum of its proper divisors (30316962).

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

22636638 is a wasteful number, since it uses less digits than its factorization.

22636638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22093 (or 22087 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 22636638 is about 4757.7975997304. The cubic root of 22636638 is about 282.8811280986.

It can be divided in two parts, 226 and 36638, that added together give a square (36864 = 192²).

The spelling of 22636638 in words is "twenty-two million, six hundred thirty-six thousand, six hundred thirty-eight".