22268538 has 48 divisors (see below), whose sum is σ = 51967656. Its totient is φ = 6865920.

The previous prime is 22268537. The next prime is 22268567. The reversal of 22268538 is 83586222.

It can be written as a sum of positive squares in 4 ways, for example, as 16378209 + 5890329 = 4047^2 + 2427^2 .

It is not an unprimeable number, because it can be changed into a prime (22268537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18070 + ... + 19262.

Almost surely, 2^22268538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22268538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25983828).

22268538 is an abundant number, since it is smaller than the sum of its proper divisors (29699118).

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

22268538 is a wasteful number, since it uses less digits than its factorization.

22268538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279 (or 1276 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 22268538 is about 4718.9551809696. The cubic root of 22268538 is about 281.3394074268.

The spelling of 22268538 in words is "twenty-two million, two hundred sixty-eight thousand, five hundred thirty-eight".