18282728 has 16 divisors (see below), whose sum is σ = 34445760. Its totient is φ = 9097200.

The previous prime is 18282683. The next prime is 18282739. The reversal of 18282728 is 82728281.

It is a super-3 number, since 3×18282728³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18282691 and 18282700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3728 + ... + 7103.

It is an arithmetic number, because the mean of its divisors is an integer number (2152860).

Almost surely, 2^18282728 is an apocalyptic number.

It is an amenable number.

18282728 is a deficient number, since it is larger than the sum of its proper divisors (16163032).

18282728 is a wasteful number, since it uses less digits than its factorization.

18282728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11048 (or 11044 counting only the distinct ones).

The product of its digits is 28672, while the sum is 38.

The square root of 18282728 is about 4275.8306795288. The cubic root of 18282728 is about 263.4391598725.

The spelling of 18282728 in words is "eighteen million, two hundred eighty-two thousand, seven hundred twenty-eight".