6439238960 has 120 divisors (see below), whose sum is σ = 18998868816. Its totient is φ = 2007022080.

The previous prime is 6439238957. The next prime is 6439239007. The reversal of 6439238960 is 698329346.

It is a junction number, because it is equal to n+sod(n) for n = 6439238899 and 6439238908.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31547 + ... + 117786.

Almost surely, 2^6439238960 is an apocalyptic number.

It is an amenable number.

6439238960 is an abundant number, since it is smaller than the sum of its proper divisors (12559629856).

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

6439238960 is a wasteful number, since it uses less digits than its factorization.

6439238960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149371 (or 149358 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 50.

The square root of 6439238960 is about 80244.8687456089. The cubic root of 6439238960 is about 1860.4222034587.

The spelling of 6439238960 in words is "six billion, four hundred thirty-nine million, two hundred thirty-eight thousand, nine hundred sixty".