22604864 has 14 divisors (see below), whose sum is σ = 44856654. Its totient is φ = 11302400.

The previous prime is 22604861. The next prime is 22604873. The reversal of 22604864 is 46840622.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 2534464 = 4480^2 + 1592^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 22604864.

It is not an unprimeable number, because it can be changed into a prime (22604861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176537 + ... + 176664.

Almost surely, 2^22604864 is an apocalyptic number.

It is an amenable number.

22604864 is a deficient number, since it is larger than the sum of its proper divisors (22251790).

22604864 is an equidigital number, since it uses as much as digits as its factorization.

22604864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353213 (or 353203 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 22604864 is about 4754.4572771243. The cubic root of 22604864 is about 282.7487104119.

The spelling of 22604864 in words is "twenty-two million, six hundred four thousand, eight hundred sixty-four".