22572138 has 16 divisors (see below), whose sum is σ = 45208800. Its totient is φ = 7513296.

The previous prime is 22572127. The next prime is 22572139. The reversal of 22572138 is 83127522.

It is not an unprimeable number, because it can be changed into a prime (22572139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2688 + ... + 7236.

It is an arithmetic number, because the mean of its divisors is an integer number (2825550).

Almost surely, 2^22572138 is an apocalyptic number.

22572138 is an abundant number, since it is smaller than the sum of its proper divisors (22636662).

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

22572138 is a wasteful number, since it uses less digits than its factorization.

22572138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5381.

The product of its digits is 6720, while the sum is 30.

The square root of 22572138 is about 4751.0144179954. The cubic root of 22572138 is about 282.6121954960.

The spelling of 22572138 in words is "twenty-two million, five hundred seventy-two thousand, one hundred thirty-eight".