22005872 has 40 divisors (see below), whose sum is σ = 49541472. Its totient is φ = 9273600.

The previous prime is 22005859. The next prime is 22005911. The reversal of 22005872 is 27850022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5222 + ... + 8442.

Almost surely, 2^22005872 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 22005872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24770736).

22005872 is an abundant number, since it is smaller than the sum of its proper divisors (27535600).

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

22005872 is a wasteful number, since it uses less digits than its factorization.

22005872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297 (or 3291 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 22005872 is about 4691.0416753638. The cubic root of 22005872 is about 280.2288605069.

Adding to 22005872 its reverse (27850022), we get a palindrome (49855894).

The spelling of 22005872 in words is "twenty-two million, five thousand, eight hundred seventy-two".