22788920 has 128 divisors (see below), whose sum is σ = 65664000. Its totient is φ = 7056000.

The previous prime is 22788869. The next prime is 22788943. The reversal of 22788920 is 2988722.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150845 + ... + 150995.

It is an arithmetic number, because the mean of its divisors is an integer number (513000).

Almost surely, 2^22788920 is an apocalyptic number.

22788920 is a gapful number since it is divisible by the number (20) 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 22788920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32832000).

22788920 is an abundant number, since it is smaller than the sum of its proper divisors (42875080).

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

22788920 is a wasteful number, since it uses less digits than its factorization.

22788920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 22788920 is about 4773.7741882079. The cubic root of 22788920 is about 283.5140469593.

The spelling of 22788920 in words is "twenty-two million, seven hundred eighty-eight thousand, nine hundred twenty".