18162872 has 64 divisors (see below), whose sum is σ = 42705600. Its totient is φ = 7050240.

The previous prime is 18162863. The next prime is 18162883. The reversal of 18162872 is 27826181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44204 + ... + 44612.

It is an arithmetic number, because the mean of its divisors is an integer number (667275).

Almost surely, 2^18162872 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 18162872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21352800).

18162872 is an abundant number, since it is smaller than the sum of its proper divisors (24542728).

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

18162872 is a wasteful number, since it uses less digits than its factorization.

18162872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 492 counting only the distinct ones).

The product of its digits is 10752, while the sum is 35.

The square root of 18162872 is about 4261.7921113072. The cubic root of 18162872 is about 262.8622216365.

The spelling of 18162872 in words is "eighteen million, one hundred sixty-two thousand, eight hundred seventy-two".