118389 has 16 divisors (see below), whose sum is σ = 174080. Its totient is φ = 71280.

The previous prime is 118387. The next prime is 118399. The reversal of 118389 is 983811.

118389 = T₁₀₂ + T₁₀₃ + ... + T₁₂₀.

It is not a de Polignac number, because 118389 - 2¹ = 118387 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1734 + ... + 1800.

It is an arithmetic number, because the mean of its divisors is an integer number (10880).

2¹¹⁸³⁸⁹ is an apocalyptic number.

118389 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

118389 is a deficient number, since it is larger than the sum of its proper divisors (55691).

118389 is a wasteful number, since it uses less digits than its factorization.

118389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120.

The product of its digits is 1728, while the sum is 30.

The square root of 118389 is about 344.0770262601. The cubic root of 118389 is about 49.1025203236.

The spelling of 118389 in words is "one hundred eighteen thousand, three hundred eighty-nine".