18382389 has 8 divisors (see below), whose sum is σ = 25951680. Its totient is φ = 11534016.

The previous prime is 18382379. The next prime is 18382393. The reversal of 18382389 is 98328381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18382389 - 2⁷ = 18382261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18382389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18382319) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 180169 + ... + 180270.

It is an arithmetic number, because the mean of its divisors is an integer number (3243960).

Almost surely, 2^18382389 is an apocalyptic number.

It is an amenable number.

18382389 is a deficient number, since it is larger than the sum of its proper divisors (7569291).

18382389 is a wasteful number, since it uses less digits than its factorization.

18382389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360459.

The product of its digits is 82944, while the sum is 42.

The square root of 18382389 is about 4287.4688337060. The cubic root of 18382389 is about 263.9169705608.

The spelling of 18382389 in words is "eighteen million, three hundred eighty-two thousand, three hundred eighty-nine".