4439989 has 4 divisors (see below), whose sum is σ = 4633056. Its totient is φ = 4246924.

The previous prime is 4439971. The next prime is 4439993. The reversal of 4439989 is 9899344.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4439989 - 2⁷ = 4439861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4439909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96499 + ... + 96544.

It is an arithmetic number, because the mean of its divisors is an integer number (1158264).

Almost surely, 2^4439989 is an apocalyptic number.

It is an amenable number.

4439989 is a deficient number, since it is larger than the sum of its proper divisors (193067).

4439989 is a wasteful number, since it uses less digits than its factorization.

4439989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193066.

The product of its digits is 279936, while the sum is 46.

The square root of 4439989 is about 2107.1281403844. The cubic root of 4439989 is about 164.3591795653.

The spelling of 4439989 in words is "four million, four hundred thirty-nine thousand, nine hundred eighty-nine".