22638825 has 48 divisors (see below), whose sum is σ = 45384000. Its totient is φ = 10972800.

The previous prime is 22638787. The next prime is 22638827. The reversal of 22638825 is 52883622.

It is not a de Polignac number, because 22638825 - 2⁶ = 22638761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22638825.

It is not an unprimeable number, because it can be changed into a prime (22638827) 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 47 ways as a sum of consecutive naturals, for example, 5901 + ... + 8949.

It is an arithmetic number, because the mean of its divisors is an integer number (945500).

Almost surely, 2^22638825 is an apocalyptic number.

22638825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22638825 is an abundant number, since it is smaller than the sum of its proper divisors (22745175).

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

22638825 is a wasteful number, since it uses less digits than its factorization.

22638825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3079 (or 3068 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 22638825 is about 4758.0274274115. The cubic root of 22638825 is about 282.8902378304.

The spelling of 22638825 in words is "twenty-two million, six hundred thirty-eight thousand, eight hundred twenty-five".