18822208 has 56 divisors (see below), whose sum is σ = 39502080. Its totient is φ = 8885760.

The previous prime is 18822187. The next prime is 18822241. The reversal of 18822208 is 80222881.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 18822208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105063 + ... + 105241.

Almost surely, 2^18822208 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 18822208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19751040).

18822208 is an abundant number, since it is smaller than the sum of its proper divisors (20679872).

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

18822208 is a wasteful number, since it uses less digits than its factorization.

18822208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 18822208 is about 4338.4568685190. The cubic root of 18822208 is about 266.0052385574.

The spelling of 18822208 in words is "eighteen million, eight hundred twenty-two thousand, two hundred eight".