18328908 has 48 divisors (see below), whose sum is σ = 46329696. Its totient is φ = 5606400.

The previous prime is 18328903. The next prime is 18328943. The reversal of 18328908 is 80982381.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (18328903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45508 + ... + 45908.

It is an arithmetic number, because the mean of its divisors is an integer number (965202).

Almost surely, 2^18328908 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 18328908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23164848).

18328908 is an abundant number, since it is smaller than the sum of its proper divisors (28000788).

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

18328908 is a wasteful number, since it uses less digits than its factorization.

18328908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 18328908 is about 4281.2273941009. The cubic root of 18328908 is about 263.6607787283.

The spelling of 18328908 in words is "eighteen million, three hundred twenty-eight thousand, nine hundred eight".