18075728 has 40 divisors (see below), whose sum is σ = 39449856. Its totient is φ = 7948800.

The previous prime is 18075713. The next prime is 18075763. The reversal of 18075728 is 82757081.

It is a junction number, because it is equal to n+sod(n) for n = 18075691 and 18075700.

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, 3800 + ... + 7112.

Almost surely, 2^18075728 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 18075728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19724928).

18075728 is an abundant number, since it is smaller than the sum of its proper divisors (21374128).

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

18075728 is a wasteful number, since it uses less digits than its factorization.

18075728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3363 (or 3357 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 18075728 is about 4251.5559504727. Note that the first 3 decimals coincide. The cubic root of 18075728 is about 262.4411502240.

The spelling of 18075728 in words is "eighteen million, seventy-five thousand, seven hundred twenty-eight".