22756728 has 64 divisors (see below), whose sum is σ = 59673600. Its totient is φ = 7223040.

The previous prime is 22756673. The next prime is 22756733. The reversal of 22756728 is 82765722.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54103 + ... + 54521.

It is an arithmetic number, because the mean of its divisors is an integer number (932400).

Almost surely, 2^22756728 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 22756728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29836800).

22756728 is an abundant number, since it is smaller than the sum of its proper divisors (36916872).

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

22756728 is a wasteful number, since it uses less digits than its factorization.

22756728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532 (or 528 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 22756728 is about 4770.4012409859. The cubic root of 22756728 is about 283.3804851938.

The spelling of 22756728 in words is "twenty-two million, seven hundred fifty-six thousand, seven hundred twenty-eight".