22726288 has 40 divisors (see below), whose sum is σ = 48717368. Its totient is φ = 10202112.

The previous prime is 22726283. The next prime is 22726303. The reversal of 22726288 is 88262722.

It can be written as a sum of positive squares in 4 ways, for example, as 7139584 + 15586704 = 2672^2 + 3948^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (22726283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6220 + ... + 9172.

Almost surely, 2^22726288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22726288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24358684).

22726288 is an abundant number, since it is smaller than the sum of its proper divisors (25991080).

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

22726288 is a wasteful number, since it uses less digits than its factorization.

22726288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011 (or 3005 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 22726288 is about 4767.2096660416. The cubic root of 22726288 is about 283.2540764090.

The spelling of 22726288 in words is "twenty-two million, seven hundred twenty-six thousand, two hundred eighty-eight".