18079728 has 40 divisors (see below), whose sum is σ = 46986576. Its totient is φ = 5990400.

The previous prime is 18079709. The next prime is 18079739. The reversal of 18079728 is 82797081.

It is a self number, because there is not a number n which added to its sum of digits gives 18079728.

It is a congruent number.

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, 7648 + ... + 9728.

Almost surely, 2^18079728 is an apocalyptic number.

It is an amenable number.

18079728 is an abundant number, since it is smaller than the sum of its proper divisors (28906848).

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

18079728 is a wasteful number, since it uses less digits than its factorization.

18079728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273 (or 2267 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 18079728 is about 4252.0263404640. The cubic root of 18079728 is about 262.4605074374.

The spelling of 18079728 in words is "eighteen million, seventy-nine thousand, seven hundred twenty-eight".