22398928 has 20 divisors (see below), whose sum is σ = 45951300. Its totient is φ = 10540544.

The previous prime is 22398923. The next prime is 22398977. The reversal of 22398928 is 82989322.

It can be written as a sum of positive squares in 2 ways, for example, as 16581184 + 5817744 = 4072^2 + 2412^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22398923) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 40903 + ... + 41446.

It is an arithmetic number, because the mean of its divisors is an integer number (2297565).

Almost surely, 2^22398928 is an apocalyptic number.

It is an amenable number.

22398928 is an abundant number, since it is smaller than the sum of its proper divisors (23552372).

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

22398928 is a wasteful number, since it uses less digits than its factorization.

22398928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82374 (or 82368 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 22398928 is about 4732.7505744546. The cubic root of 22398928 is about 281.8874523631.

The spelling of 22398928 in words is "twenty-two million, three hundred ninety-eight thousand, nine hundred twenty-eight".