6396439 has 8 divisors (see below), whose sum is σ = 7327008. Its totient is φ = 5470080.

The previous prime is 6396433. The next prime is 6396463. The reversal of 6396439 is 9346936.

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

It is not a de Polignac number, because 6396439 - 2¹⁵ = 6363671 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 (6396433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3579 + ... + 5059.

It is an arithmetic number, because the mean of its divisors is an integer number (915876).

Almost surely, 2^6396439 is an apocalyptic number.

6396439 is a deficient number, since it is larger than the sum of its proper divisors (930569).

6396439 is a wasteful number, since it uses less digits than its factorization.

6396439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105.

The product of its digits is 104976, while the sum is 40.

The square root of 6396439 is about 2529.1182257854. The cubic root of 6396439 is about 185.6291121688.

The spelling of 6396439 in words is "six million, three hundred ninety-six thousand, four hundred thirty-nine".