18376728 has 64 divisors (see below), whose sum is σ = 49390560. Its totient is φ = 5677056.

The previous prime is 18376703. The next prime is 18376739. The reversal of 18376728 is 82767381.

It is a self number, because there is not a number n which added to its sum of digits gives 18376728.

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, 29476 + ... + 30092.

Almost surely, 2^18376728 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 18376728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24695280).

18376728 is an abundant number, since it is smaller than the sum of its proper divisors (31013832).

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

18376728 is a wasteful number, since it uses less digits than its factorization.

18376728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 712 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 18376728 is about 4286.8086031452. The cubic root of 18376728 is about 263.8898760164.

The spelling of 18376728 in words is "eighteen million, three hundred seventy-six thousand, seven hundred twenty-eight".