22193728 has 28 divisors (see below), whose sum is σ = 44190412. Its totient is φ = 11059200.

The previous prime is 22193711. The next prime is 22193753. The reversal of 22193728 is 82739122.

It can be written as a sum of positive squares in 2 ways, for example, as 20866624 + 1327104 = 4568^2 + 1152^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22193693 and 22193702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36628 + ... + 37228.

It is an arithmetic number, because the mean of its divisors is an integer number (1578229).

Almost surely, 2^22193728 is an apocalyptic number.

It is an amenable number.

22193728 is a deficient number, since it is larger than the sum of its proper divisors (21996684).

22193728 is an equidigital number, since it uses as much as digits as its factorization.

22193728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190 (or 1180 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 22193728 is about 4711.0219698066. The cubic root of 22193728 is about 281.0240055816.

The spelling of 22193728 in words is "twenty-two million, one hundred ninety-three thousand, seven hundred twenty-eight".