22398724 has 12 divisors (see below), whose sum is σ = 41503644. Its totient is φ = 10540544.

The previous prime is 22398713. The next prime is 22398731. The reversal of 22398724 is 42789322.

It can be written as a sum of positive squares in 2 ways, for example, as 20088324 + 2310400 = 4482^2 + 1520^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164629 + ... + 164764.

It is an arithmetic number, because the mean of its divisors is an integer number (3458637).

Almost surely, 2^22398724 is an apocalyptic number.

It is an amenable number.

22398724 is a deficient number, since it is larger than the sum of its proper divisors (19104920).

22398724 is a wasteful number, since it uses less digits than its factorization.

22398724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329414 (or 329412 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 22398724 is about 4732.7290224563. The cubic root of 22398724 is about 281.8865965898.

The spelling of 22398724 in words is "twenty-two million, three hundred ninety-eight thousand, seven hundred twenty-four".