22638609 has 24 divisors (see below), whose sum is σ = 38758720. Its totient is φ = 12935376.

The previous prime is 22638593. The next prime is 22638617. The reversal of 22638609 is 90683622.

It is not a de Polignac number, because 22638609 - 2⁴ = 22638593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22638659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4954 + ... + 8355.

Almost surely, 2^22638609 is an apocalyptic number.

It is an amenable number.

22638609 is a deficient number, since it is larger than the sum of its proper divisors (16120111).

22638609 is an equidigital number, since it uses as much as digits as its factorization.

22638609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13331 (or 13319 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 22638609 is about 4758.0047288753. The cubic root of 22638609 is about 282.8893381299.

The spelling of 22638609 in words is "twenty-two million, six hundred thirty-eight thousand, six hundred nine".