22208288 has 24 divisors (see below), whose sum is σ = 44906652. Its totient is φ = 10803456.

The previous prime is 22208281. The next prime is 22208297. The reversal of 22208288 is 88280222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20539024 + 1669264 = 4532^2 + 1292^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (22208281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8195 + ... + 10562.

Almost surely, 2^22208288 is an apocalyptic number.

It is an amenable number.

22208288 is an abundant number, since it is smaller than the sum of its proper divisors (22698364).

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

22208288 is a wasteful number, since it uses less digits than its factorization.

22208288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18804 (or 18796 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 22208288 is about 4712.5670287010. The cubic root of 22208288 is about 281.0854465898.

The spelling of 22208288 in words is "twenty-two million, two hundred eight thousand, two hundred eighty-eight".