18385328 has 40 divisors (see below), whose sum is σ = 38674608. Its totient is φ = 8416512.

The previous prime is 18385277. The next prime is 18385351. The reversal of 18385328 is 82358381.

It is a junction number, because it is equal to n+sod(n) for n = 18385291 and 18385300.

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, 32375 + ... + 32937.

Almost surely, 2^18385328 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 18385328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19337304).

18385328 is an abundant number, since it is smaller than the sum of its proper divisors (20289280).

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

18385328 is a wasteful number, since it uses less digits than its factorization.

18385328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 735 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 18385328 is about 4287.8115630237. The cubic root of 18385328 is about 263.9310349395.

The spelling of 18385328 in words is "eighteen million, three hundred eighty-five thousand, three hundred twenty-eight".