22347428 has 12 divisors (see below), whose sum is σ = 39416832. Its totient is φ = 11085480.

The previous prime is 22347407. The next prime is 22347431. The reversal of 22347428 is 82474322.

It is a junction number, because it is equal to n+sod(n) for n = 22347394 and 22347403.

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, 21488 + ... + 22503.

It is an arithmetic number, because the mean of its divisors is an integer number (3284736).

Almost surely, 2^22347428 is an apocalyptic number.

It is an amenable number.

22347428 is a deficient number, since it is larger than the sum of its proper divisors (17069404).

22347428 is a wasteful number, since it uses less digits than its factorization.

22347428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44122 (or 44120 counting only the distinct ones).

The product of its digits is 21504, while the sum is 32.

The square root of 22347428 is about 4727.3066327455. The cubic root of 22347428 is about 281.6712464194.

The spelling of 22347428 in words is "twenty-two million, three hundred forty-seven thousand, four hundred twenty-eight".