6444039 has 24 divisors (see below), whose sum is σ = 10177920. Its totient is φ = 3615024.

The previous prime is 6444019. The next prime is 6444041. The reversal of 6444039 is 9304446.

It is not a de Polignac number, because 6444039 - 2⁷ = 6443911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6443997 and 6444015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8302 + ... + 9044.

It is an arithmetic number, because the mean of its divisors is an integer number (424080).

Almost surely, 2^6444039 is an apocalyptic number.

6444039 is a deficient number, since it is larger than the sum of its proper divisors (3733881).

6444039 is a wasteful number, since it uses less digits than its factorization.

6444039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 6444039 is about 2538.5111778363. The cubic root of 6444039 is about 186.0884363818.

The spelling of 6444039 in words is "six million, four hundred forty-four thousand, thirty-nine".