22804428 has 12 divisors (see below), whose sum is σ = 53210360. Its totient is φ = 7601472.

The previous prime is 22804403. The next prime is 22804433. The reversal of 22804428 is 82440822.

It is a tau number, because it is divible by the number of its divisors (12).

22804428 is a modest number, since divided by 4428 gives 228 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 22804395 and 22804404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950173 + ... + 950196.

Almost surely, 2^22804428 is an apocalyptic number.

It is an amenable number.

22804428 is an abundant number, since it is smaller than the sum of its proper divisors (30405932).

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

22804428 is a wasteful number, since it uses less digits than its factorization.

22804428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900376 (or 1900374 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

The square root of 22804428 is about 4775.3982032915. The cubic root of 22804428 is about 283.5783433935.

It can be divided in two parts, 22804 and 428, that added together give a palindrome (23232).

The spelling of 22804428 in words is "twenty-two million, eight hundred four thousand, four hundred twenty-eight".