22978864 has 20 divisors (see below), whose sum is σ = 45470304. Its totient is φ = 11244608.

The previous prime is 22978861. The next prime is 22978897. The reversal of 22978864 is 46887922.

It is not an unprimeable number, because it can be changed into a prime (22978861) by changing a digit.

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, 14527 + ... + 16030.

Almost surely, 2^22978864 is an apocalyptic number.

It is an amenable number.

22978864 is a deficient number, since it is larger than the sum of its proper divisors (22491440).

22978864 is a wasteful number, since it uses less digits than its factorization.

22978864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30612 (or 30606 counting only the distinct ones).

The product of its digits is 387072, while the sum is 46.

The square root of 22978864 is about 4793.6274365036. The cubic root of 22978864 is about 284.2995582836.

The spelling of 22978864 in words is "twenty-two million, nine hundred seventy-eight thousand, eight hundred sixty-four".