22638380 has 12 divisors (see below), whose sum is σ = 47540640. Its totient is φ = 9055344.

The previous prime is 22638377. The next prime is 22638389. The reversal of 22638380 is 8383622.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (22638389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565940 + ... + 565979.

It is an arithmetic number, because the mean of its divisors is an integer number (3961720).

Almost surely, 2^22638380 is an apocalyptic number.

22638380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22638380 is an abundant number, since it is smaller than the sum of its proper divisors (24902260).

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

22638380 is a wasteful number, since it uses less digits than its factorization.

22638380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131928 (or 1131926 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 22638380 is about 4757.9806641053. The cubic root of 22638380 is about 282.8883842745. Note that the first 3 decimals are identical.

The spelling of 22638380 in words is "twenty-two million, six hundred thirty-eight thousand, three hundred eighty".