22557128 has 32 divisors (see below), whose sum is σ = 47736000. Its totient is φ = 9898560.

The previous prime is 22557121. The next prime is 22557131. The reversal of 22557128 is 82175522.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22557094 and 22557103.

It is not an unprimeable number, because it can be changed into a prime (22557121) 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, 1868 + ... + 6971.

It is an arithmetic number, because the mean of its divisors is an integer number (1491750).

Almost surely, 2^22557128 is an apocalyptic number.

It is an amenable number.

22557128 is an abundant number, since it is smaller than the sum of its proper divisors (25178872).

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

22557128 is a wasteful number, since it uses less digits than its factorization.

22557128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8885 (or 8881 counting only the distinct ones).

The product of its digits is 11200, while the sum is 32.

The square root of 22557128 is about 4749.4344926528. The cubic root of 22557128 is about 282.5495378708.

The spelling of 22557128 in words is "twenty-two million, five hundred fifty-seven thousand, one hundred twenty-eight".