4439 has 4 divisors (see below), whose sum is σ = 4656.
Its totient is φ = 4224.
The previous prime is 4423. The next prime is 4441. The reversal of 4439 is 9344.
4439 = T7 + T8 + ... +
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 4439 - 24 = 4423 is a prime.
It is a Duffinian number.
Its product of digits (432) is a multiple of the sum of its prime divisors (216).
It is a plaindrome in base 12, base 15 and base 16.
It is a self number, because there is not a number n which added to its sum of digits gives 4439.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (4409) by changing a digit.
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, 74 + ... + 119.
It is an arithmetic number, because the mean of its divisors is an integer number (1164).
4439 is a deficient number, since it is larger than the sum of its proper divisors (217).
4439 is a wasteful number, since it uses less digits than its factorization.
4439 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 216.
The product of its digits is 432, while the sum is 20.
The square root of 4439 is about 66.6258208205.
The cubic root of 4439 is about 16.4346975083.
The spelling of 4439 in words is "four thousand, four hundred thirty-nine".