22772864 has 16 divisors (see below), whose sum is σ = 45368070. Its totient is φ = 11386368.

The previous prime is 22772857. The next prime is 22772899. The reversal of 22772864 is 46827722.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16974400 + 5798464 = 4120^2 + 2408^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 88829 + ... + 89084.

Almost surely, 2^22772864 is an apocalyptic number.

It is an amenable number.

22772864 is a deficient number, since it is larger than the sum of its proper divisors (22595206).

22772864 is an equidigital number, since it uses as much as digits as its factorization.

22772864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177927 (or 177915 counting only the distinct ones).

The product of its digits is 75264, while the sum is 38.

The square root of 22772864 is about 4772.0922036356. The cubic root of 22772864 is about 283.4474477666.

The spelling of 22772864 in words is "twenty-two million, seven hundred seventy-two thousand, eight hundred sixty-four".