18328856 has 64 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 6819840.

The previous prime is 18328837. The next prime is 18328859. The reversal of 18328856 is 65882381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18328859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11636 + ... + 13116.

It is an arithmetic number, because the mean of its divisors is an integer number (700245).

Almost surely, 2^18328856 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 18328856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22407840).

18328856 is an abundant number, since it is smaller than the sum of its proper divisors (26486824).

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

18328856 is a wasteful number, since it uses less digits than its factorization.

18328856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524 (or 1520 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The square root of 18328856 is about 4281.2213210718. The cubic root of 18328856 is about 263.6605293886.

The spelling of 18328856 in words is "eighteen million, three hundred twenty-eight thousand, eight hundred fifty-six".