6439670 has 16 divisors (see below), whose sum is σ = 12201840. Its totient is φ = 2440224.

The previous prime is 6439639. The next prime is 6439679. The reversal of 6439670 is 769346.

It is a self number, because there is not a number n which added to its sum of digits gives 6439670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6439679) 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, 16757 + ... + 17136.

It is an arithmetic number, because the mean of its divisors is an integer number (762615).

Almost surely, 2^6439670 is an apocalyptic number.

6439670 is a deficient number, since it is larger than the sum of its proper divisors (5762170).

6439670 is a wasteful number, since it uses less digits than its factorization.

6439670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33919.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 6439670 is about 2537.6504881484. The cubic root of 6439670 is about 186.0463714497.

The spelling of 6439670 in words is "six million, four hundred thirty-nine thousand, six hundred seventy".