18238208 has 36 divisors (see below), whose sum is σ = 36693888. Its totient is φ = 9047040.

The previous prime is 18238193. The next prime is 18238217. The reversal of 18238208 is 80283281.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48710 + ... + 49082.

Almost surely, 2^18238208 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 18238208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18346944).

18238208 is an abundant number, since it is smaller than the sum of its proper divisors (18455680).

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

18238208 is an equidigital number, since it uses as much as digits as its factorization.

18238208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 18238208 is about 4270.6215004376. The cubic root of 18238208 is about 263.2251538061.

The spelling of 18238208 in words is "eighteen million, two hundred thirty-eight thousand, two hundred eight".