4389 has 16 divisors (see below), whose sum is σ = 7680.
Its totient is φ = 2160.
The previous prime is 4373. The next prime is 4391. The reversal of 4389 is 9834.
Adding to 4389 its product of digits (864), we get a triangular number (5253 = T102).
Subtracting 4389 from its reverse (9834), we obtain a palindrome (5445).
It can be divided in two parts, 4 and 389, that added together give a palindrome (393).
It is not a de Polignac number, because 4389 - 24 = 4373 is a prime.
It is an alternating number because its digits alternate between even and odd.
It is a Curzon number.
4389 is a lucky number.
It is a plaindrome in base 15 and base 16.
It is a nialpdrome in base 11.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (4339) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222 + ... + 240.
It is an arithmetic number, because the mean of its divisors is an integer number (480).
It is an amenable number.
4389 is a deficient number, since it is larger than the sum of its proper divisors (3291).
4389 is a wasteful number, since it uses less digits than its factorization.
4389 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 40.
The product of its digits is 864, while the sum is 24.
The square root of 4389 is about 66.2495283002.
The cubic root of 4389 is about 16.3727586622.
The spelling of 4389 in words is "four thousand, three hundred eighty-nine".