22381568 has 44 divisors (see below), whose sum is σ = 48833232. Its totient is φ = 10168320.

The previous prime is 22381561. The next prime is 22381573. The reversal of 22381568 is 86518322.

It is a tau number, because it is divible by the number of its divisors (44).

It is a super-2 number, since 2×22381568² = 1001869172277248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22381561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10271 + ... + 12257.

Almost surely, 2^22381568 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 22381568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24416616).

22381568 is an abundant number, since it is smaller than the sum of its proper divisors (26451664).

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

22381568 is a wasteful number, since it uses less digits than its factorization.

22381568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018 (or 2000 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 22381568 is about 4730.9161903378. The cubic root of 22381568 is about 281.8146091308.

The spelling of 22381568 in words is "twenty-two million, three hundred eighty-one thousand, five hundred sixty-eight".