22253728 has 24 divisors (see below), whose sum is σ = 50071392. Its totient is φ = 9537216.

The previous prime is 22253723. The next prime is 22253729. The reversal of 22253728 is 82735222.

It is a self number, because there is not a number n which added to its sum of digits gives 22253728.

It is not an unprimeable number, because it can be changed into a prime (22253723) 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, 49450 + ... + 49897.

It is an arithmetic number, because the mean of its divisors is an integer number (2086308).

Almost surely, 2^22253728 is an apocalyptic number.

22253728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22253728 is an abundant number, since it is smaller than the sum of its proper divisors (27817664).

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

22253728 is an equidigital number, since it uses as much as digits as its factorization.

22253728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99364 (or 99356 counting only the distinct ones).

The product of its digits is 13440, while the sum is 31.

The square root of 22253728 is about 4717.3857166867. The cubic root of 22253728 is about 281.2770240370.

The spelling of 22253728 in words is "twenty-two million, two hundred fifty-three thousand, seven hundred twenty-eight".