18338256 has 60 divisors (see below), whose sum is σ = 51609792. Its totient is φ = 6078528.

The previous prime is 18338239. The next prime is 18338261. The reversal of 18338256 is 65283381.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18338256.

It is a congruent number.

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, 49785 + ... + 50151.

Almost surely, 2^18338256 is an apocalyptic number.

18338256 is a gapful number since it is divisible by the number (16) 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 18338256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25804896).

18338256 is an abundant number, since it is smaller than the sum of its proper divisors (33271536).

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

18338256 is a wasteful number, since it uses less digits than its factorization.

18338256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 719 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 18338256 is about 4282.3189979262. The cubic root of 18338256 is about 263.7055946746.

The spelling of 18338256 in words is "eighteen million, three hundred thirty-eight thousand, two hundred fifty-six".