22782216 has 64 divisors (see below), whose sum is σ = 61286400. Its totient is φ = 7034688.

The previous prime is 22782203. The next prime is 22782247. The reversal of 22782216 is 61228722.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20901 + ... + 21963.

It is an arithmetic number, because the mean of its divisors is an integer number (957600).

Almost surely, 2^22782216 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 22782216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30643200).

22782216 is an abundant number, since it is smaller than the sum of its proper divisors (38504184).

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

22782216 is a wasteful number, since it uses less digits than its factorization.

22782216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138 (or 1134 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 22782216 is about 4773.0719667736. The cubic root of 22782216 is about 283.4862430297.

The spelling of 22782216 in words is "twenty-two million, seven hundred eighty-two thousand, two hundred sixteen".