22639172 has 18 divisors (see below), whose sum is σ = 42021882. Its totient is φ = 10635264.

The previous prime is 22639171. The next prime is 22639187. The reversal of 22639172 is 27193622.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 20286016 + 2353156 = 4504^2 + 1534^2 .

It is not an unprimeable number, because it can be changed into a prime (22639171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38948 + ... + 39524.

It is an arithmetic number, because the mean of its divisors is an integer number (2334549).

Almost surely, 2^22639172 is an apocalyptic number.

It is an amenable number.

22639172 is a deficient number, since it is larger than the sum of its proper divisors (19382710).

22639172 is an equidigital number, since it uses as much as digits as its factorization.

22639172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175 (or 596 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 22639172 is about 4758.0638919628. The cubic root of 22639172 is about 282.8916831706.

The spelling of 22639172 in words is "twenty-two million, six hundred thirty-nine thousand, one hundred seventy-two".