22559638 has 4 divisors (see below), whose sum is σ = 33839460. Its totient is φ = 11279818.

The previous prime is 22559617. The next prime is 22559657. The reversal of 22559638 is 83695522.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 22559638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5639908 + ... + 5639911.

It is an arithmetic number, because the mean of its divisors is an integer number (8459865).

Almost surely, 2^22559638 is an apocalyptic number.

22559638 is a deficient number, since it is larger than the sum of its proper divisors (11279822).

22559638 is a wasteful number, since it uses less digits than its factorization.

22559638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11279821.

The product of its digits is 129600, while the sum is 40.

The square root of 22559638 is about 4749.6987272879. The cubic root of 22559638 is about 282.5600175300.

The spelling of 22559638 in words is "twenty-two million, five hundred fifty-nine thousand, six hundred thirty-eight".