18328 has 16 divisors (see below), whose sum is σ = 36000. Its totient is φ = 8736.

The previous prime is 18313. The next prime is 18329. The reversal of 18328 is 82381.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 18299 and 18308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18329) by changing a digit.

18328 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193 + ... + 271.

It is an arithmetic number, because the mean of its divisors is an integer number (2250).

2¹⁸³²⁸ is an apocalyptic number.

It is an amenable number.

18328 is a deficient number, since it is larger than the sum of its proper divisors (17672).

18328 is a wasteful number, since it uses less digits than its factorization.

18328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 110 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 18328 is about 135.3809440062. The cubic root of 18328 is about 26.3656424806.

The spelling of 18328 in words is "eighteen thousand, three hundred twenty-eight".