18157328 has 20 divisors (see below), whose sum is σ = 40205760. Its totient is φ = 7781664.

The previous prime is 18157303. The next prime is 18157339. The reversal of 18157328 is 82375181.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80948 + ... + 81171.

It is an arithmetic number, because the mean of its divisors is an integer number (2010288).

Almost surely, 2^18157328 is an apocalyptic number.

It is an amenable number.

18157328 is an abundant number, since it is smaller than the sum of its proper divisors (22048432).

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

18157328 is a wasteful number, since it uses less digits than its factorization.

18157328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162134 (or 162128 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 18157328 is about 4261.1416310656. The cubic root of 18157328 is about 262.8354737291.

The spelling of 18157328 in words is "eighteen million, one hundred fifty-seven thousand, three hundred twenty-eight".