22728332 has 48 divisors (see below), whose sum is σ = 47201280. Its totient is φ = 9460800.

The previous prime is 22728317. The next prime is 22728341. The reversal of 22728332 is 23382722.

It is a junction number, because it is equal to n+sod(n) for n = 22728295 and 22728304.

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, 25478 + ... + 26354.

It is an arithmetic number, because the mean of its divisors is an integer number (983360).

Almost surely, 2^22728332 is an apocalyptic number.

22728332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22728332 is an abundant number, since it is smaller than the sum of its proper divisors (24472948).

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

22728332 is a wasteful number, since it uses less digits than its factorization.

22728332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942 (or 940 counting only the distinct ones).

The product of its digits is 8064, while the sum is 29.

The square root of 22728332 is about 4767.4240423944. The cubic root of 22728332 is about 283.2625681019.

The spelling of 22728332 in words is "twenty-two million, seven hundred twenty-eight thousand, three hundred thirty-two".