6439834220 has 24 divisors (see below), whose sum is σ = 13526268000. Its totient is φ = 2575435392.

The previous prime is 6439834199. The next prime is 6439834229. The reversal of 6439834220 is 224389346.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6439834229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85481 + ... + 142079.

It is an arithmetic number, because the mean of its divisors is an integer number (563594500).

Almost surely, 2^6439834220 is an apocalyptic number.

It is an amenable number.

6439834220 is an abundant number, since it is smaller than the sum of its proper divisors (7086433780).

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

6439834220 is a wasteful number, since it uses less digits than its factorization.

6439834220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62297 (or 62295 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 41.

The square root of 6439834220 is about 80248.5776820998. The cubic root of 6439834220 is about 1860.4795291150.

The spelling of 6439834220 in words is "six billion, four hundred thirty-nine million, eight hundred thirty-four thousand, two hundred twenty".