22564398 has 16 divisors (see below), whose sum is σ = 45311616. Its totient is φ = 7491000.

The previous prime is 22564387. The next prime is 22564427. The reversal of 22564398 is 89346522.

It is a happy number.

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, 5986 + ... + 8997.

It is an arithmetic number, because the mean of its divisors is an integer number (2831976).

Almost surely, 2^22564398 is an apocalyptic number.

22564398 is an abundant number, since it is smaller than the sum of its proper divisors (22747218).

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

22564398 is a wasteful number, since it uses less digits than its factorization.

22564398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15239.

The product of its digits is 103680, while the sum is 39.

The square root of 22564398 is about 4750.1997852722. The cubic root of 22564398 is about 282.5798891712.

The spelling of 22564398 in words is "twenty-two million, five hundred sixty-four thousand, three hundred ninety-eight".