22539428 has 12 divisors (see below), whose sum is σ = 39887820. Its totient is φ = 11142912.

The previous prime is 22539427. The next prime is 22539437. The reversal of 22539428 is 82493522.

It can be written as a sum of positive squares in 2 ways, for example, as 12054784 + 10484644 = 3472^2 + 3238^2 .

It is a hoax number, since the sum of its digits (35) 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 (22539421) 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, 31301 + ... + 32012.

It is an arithmetic number, because the mean of its divisors is an integer number (3323985).

Almost surely, 2^22539428 is an apocalyptic number.

It is an amenable number.

22539428 is a deficient number, since it is larger than the sum of its proper divisors (17348392).

22539428 is a wasteful number, since it uses less digits than its factorization.

22539428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63406 (or 63404 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 22539428 is about 4747.5707472348. The cubic root of 22539428 is about 282.4756154064.

The spelling of 22539428 in words is "twenty-two million, five hundred thirty-nine thousand, four hundred twenty-eight".