22525728 has 96 divisors (see below), whose sum is σ = 62233920. Its totient is φ = 7127040.

The previous prime is 22525709. The next prime is 22525729. The reversal of 22525728 is 82752522.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (22525729) by changing a digit.

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, 232176 + ... + 232272.

It is an arithmetic number, because the mean of its divisors is an integer number (648270).

Almost surely, 2^22525728 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 22525728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31116960).

22525728 is an abundant number, since it is smaller than the sum of its proper divisors (39708192).

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

22525728 is a wasteful number, since it uses less digits than its factorization.

22525728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 202 counting only the distinct ones).

The product of its digits is 22400, while the sum is 33.

The square root of 22525728 is about 4746.1276847552. The cubic root of 22525728 is about 282.4183720095.

The spelling of 22525728 in words is "twenty-two million, five hundred twenty-five thousand, seven hundred twenty-eight".