22256538 has 8 divisors (see below), whose sum is σ = 44513088. Its totient is φ = 7418844.

The previous prime is 22256527. The next prime is 22256551. The reversal of 22256538 is 83565222.

It is a sphenic number, since it is the product of 3 distinct primes.

22256538 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 22256499 and 22256508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1854706 + ... + 1854717.

It is an arithmetic number, because the mean of its divisors is an integer number (5564136).

Almost surely, 2^22256538 is an apocalyptic number.

22256538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22256538 is a wasteful number, since it uses less digits than its factorization.

22256538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3709428.

The product of its digits is 28800, while the sum is 33.

The square root of 22256538 is about 4717.6835417395. The cubic root of 22256538 is about 281.2888625804.

The spelling of 22256538 in words is "twenty-two million, two hundred fifty-six thousand, five hundred thirty-eight".