8120839968 has 36 divisors (see below), whose sum is σ = 23093639478. Its totient is φ = 2706946560.

The previous prime is 8120839967. The next prime is 8120840003. The reversal of 8120839968 is 8699380218.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7504410384 + 616429584 = 86628^2 + 24828^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (8120839967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14098393 + ... + 14098968.

Almost surely, 2^8120839968 is an apocalyptic number.

It is an amenable number.

8120839968 is an abundant number, since it is smaller than the sum of its proper divisors (14972799510).

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

8120839968 is a wasteful number, since it uses less digits than its factorization.

8120839968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28197377 (or 28197366 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 8120839968 is about 90115.7032264633. The cubic root of 8120839968 is about 2010.0197161503.

The spelling of 8120839968 in words is "eight billion, one hundred twenty million, eight hundred thirty-nine thousand, nine hundred sixty-eight".