22620864 has 56 divisors (see below), whose sum is σ = 68405248. Its totient is φ = 6462720.

The previous prime is 22620853. The next prime is 22620901. The reversal of 22620864 is 46802622.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7072 + ... + 9759.

Almost surely, 2^22620864 is an apocalyptic number.

22620864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22620864 is an abundant number, since it is smaller than the sum of its proper divisors (45784384).

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

22620864 is a wasteful number, since it uses less digits than its factorization.

22620864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16853 (or 16843 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 22620864 is about 4756.1396110711. The cubic root of 22620864 is about 282.8154056802.

The spelling of 22620864 in words is "twenty-two million, six hundred twenty thousand, eight hundred sixty-four".