18128304 has 90 divisors (see below), whose sum is σ = 52823628. Its totient is φ = 5803200.

The previous prime is 18128287. The next prime is 18128311. The reversal of 18128304 is 40382181.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 138319 + ... + 138449.

Almost surely, 2^18128304 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 18128304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26411814).

18128304 is an abundant number, since it is smaller than the sum of its proper divisors (34695324).

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

18128304 is a wasteful number, since it uses less digits than its factorization.

18128304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 18128304 is about 4257.7346089206. The cubic root of 18128304 is about 262.6953539002.

The spelling of 18128304 in words is "eighteen million, one hundred twenty-eight thousand, three hundred four".