22978816 has 36 divisors (see below), whose sum is σ = 52424512. Its totient is φ = 9847296.

The previous prime is 22978811. The next prime is 22978829. The reversal of 22978816 is 61887922.

It is not an unprimeable number, because it can be changed into a prime (22978811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4620 + ... + 8203.

Almost surely, 2^22978816 is an apocalyptic number.

It is an amenable number.

22978816 is an abundant number, since it is smaller than the sum of its proper divisors (29445696).

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

22978816 is an equidigital number, since it uses as much as digits as its factorization.

22978816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12846 (or 12832 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 22978816 is about 4793.6224298541. The cubic root of 22978816 is about 284.2993603279.

The spelling of 22978816 in words is "twenty-two million, nine hundred seventy-eight thousand, eight hundred sixteen".