22897128 has 64 divisors (see below), whose sum is σ = 60840000. Its totient is φ = 7160832.

The previous prime is 22897111. The next prime is 22897157. The reversal of 22897128 is 82179822.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67776 + ... + 68112.

It is an arithmetic number, because the mean of its divisors is an integer number (950625).

Almost surely, 2^22897128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22897128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30420000).

22897128 is an abundant number, since it is smaller than the sum of its proper divisors (37942872).

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

22897128 is a wasteful number, since it uses less digits than its factorization.

22897128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 510 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 22897128 is about 4785.0943564365. The cubic root of 22897128 is about 283.9620725652.

The spelling of 22897128 in words is "twenty-two million, eight hundred ninety-seven thousand, one hundred twenty-eight".