22004992 has 36 divisors (see below), whose sum is σ = 44968000. Its totient is φ = 10741248.

The previous prime is 22004989. The next prime is 22005013. The reversal of 22004992 is 29940022.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22004992.

It is a congruent number.

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, 10009 + ... + 12007.

Almost surely, 2^22004992 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 22004992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22484000).

22004992 is an abundant number, since it is smaller than the sum of its proper divisors (22963008).

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

22004992 is an equidigital number, since it uses as much as digits as its factorization.

22004992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058 (or 2044 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 22004992 is about 4690.9478786275. The cubic root of 22004992 is about 280.2251250693.

The spelling of 22004992 in words is "twenty-two million, four thousand, nine hundred ninety-two".