6439432842 has 48 divisors (see below), whose sum is σ = 14851512000. Its totient is φ = 2010647232.

The previous prime is 6439432807. The next prime is 6439432847. The reversal of 6439432842 is 2482349346.

It is not an unprimeable number, because it can be changed into a prime (6439432847) 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, 75342 + ... + 136217.

It is an arithmetic number, because the mean of its divisors is an integer number (309406500).

Almost surely, 2^6439432842 is an apocalyptic number.

6439432842 is an abundant number, since it is smaller than the sum of its proper divisors (8412079158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6439432842 is a wasteful number, since it uses less digits than its factorization.

6439432842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211675 (or 211672 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The square root of 6439432842 is about 80246.0768012991. The cubic root of 6439432842 is about 1860.4408753732.

The spelling of 6439432842 in words is "six billion, four hundred thirty-nine million, four hundred thirty-two thousand, eight hundred forty-two".