22638385 has 32 divisors (see below), whose sum is σ = 34209792. Its totient is φ = 13970880.

The previous prime is 22638377. The next prime is 22638389. The reversal of 22638385 is 58383622.

It is not a de Polignac number, because 22638385 - 2³ = 22638377 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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 31 ways as a sum of consecutive naturals, for example, 48664 + ... + 49126.

It is an arithmetic number, because the mean of its divisors is an integer number (1069056).

Almost surely, 2^22638385 is an apocalyptic number.

It is an amenable number.

22638385 is a deficient number, since it is larger than the sum of its proper divisors (11571407).

22638385 is a wasteful number, since it uses less digits than its factorization.

22638385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613.

The product of its digits is 69120, while the sum is 37.

The square root of 22638385 is about 4757.9811895383. The cubic root of 22638385 is about 282.8884051011. Note that the first 3 decimals are identical.

It can be divided in two parts, 2263 and 8385, that added together give a cube (10648 = 22³).

The spelling of 22638385 in words is "twenty-two million, six hundred thirty-eight thousand, three hundred eighty-five".