22797216 has 72 divisors (see below), whose sum is σ = 69827940. Its totient is φ = 7013376.

The previous prime is 22797193. The next prime is 22797263. The reversal of 22797216 is 61279722.

It can be written as a sum of positive squares in 2 ways, for example, as 20250000 + 2547216 = 4500^2 + 1596^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 700 + ... + 6788.

Almost surely, 2^22797216 is an apocalyptic number.

22797216 is a gapful number since it is divisible by the number (26) 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 22797216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34913970).

22797216 is an abundant number, since it is smaller than the sum of its proper divisors (47030724).

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

22797216 is a wasteful number, since it uses less digits than its factorization.

22797216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6118 (or 6107 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 22797216 is about 4774.6430233055. The cubic root of 22797216 is about 283.5484459448.

The spelling of 22797216 in words is "twenty-two million, seven hundred ninety-seven thousand, two hundred sixteen".