22788216 has 160 divisors (see below), whose sum is σ = 73180800. Its totient is φ = 6557760.

The previous prime is 22788203. The next prime is 22788217. The reversal of 22788216 is 61288722.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22788217) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 163875 + ... + 164013.

It is an arithmetic number, because the mean of its divisors is an integer number (457380).

Almost surely, 2^22788216 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 22788216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36590400).

22788216 is an abundant number, since it is smaller than the sum of its proper divisors (50392584).

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

22788216 is a wasteful number, since it uses less digits than its factorization.

22788216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 178 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 22788216 is about 4773.7004514318. The cubic root of 22788216 is about 283.5111274712.

The spelling of 22788216 in words is "twenty-two million, seven hundred eighty-eight thousand, two hundred sixteen".