22289904 has 240 divisors, whose sum is σ = 81140640. Its totient is φ = 5878656.

The previous prime is 22289903. The next prime is 22289909. The reversal of 22289904 is 40998222.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22289903) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1714602 + ... + 1714614.

It is an arithmetic number, because the mean of its divisors is an integer number (338086).

Almost surely, 2^22289904 is an apocalyptic number.

22289904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22289904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40570320).

22289904 is an abundant number, since it is smaller than the sum of its proper divisors (58850736).

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

22289904 is an equidigital number, since it uses as much as digits as its factorization.

22289904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 25 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 22289904 is about 4721.2184867892. The cubic root of 22289904 is about 281.4293575965.

The spelling of 22289904 in words is "twenty-two million, two hundred eighty-nine thousand, nine hundred four".