22391872 has 28 divisors (see below), whose sum is σ = 44702476. Its totient is φ = 11128320.

The previous prime is 22391867. The next prime is 22391893. The reversal of 22391872 is 27819322.

It can be written as a sum of positive squares in 2 ways, for example, as 5875776 + 16516096 = 2424^2 + 4064^2 .

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, 10618 + ... + 12550.

It is an arithmetic number, because the mean of its divisors is an integer number (1596517).

Almost surely, 2^22391872 is an apocalyptic number.

It is an amenable number.

22391872 is a deficient number, since it is larger than the sum of its proper divisors (22310604).

22391872 is a wasteful number, since it uses less digits than its factorization.

22391872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126 (or 2116 counting only the distinct ones).

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

The square root of 22391872 is about 4732.0050718485. The cubic root of 22391872 is about 281.8578496554.

The spelling of 22391872 in words is "twenty-two million, three hundred ninety-one thousand, eight hundred seventy-two".