8120868928 has 56 divisors (see below), whose sum is σ = 16568681112. Its totient is φ = 3946328064.

The previous prime is 8120868919. The next prime is 8120868937. The reversal of 8120868928 is 8298680218.

It is an interprime number because it is at equal distance from previous prime (8120868919) and next prime (8120868937).

It can be written as a sum of positive squares in 4 ways, for example, as 4307559424 + 3813309504 = 65632^2 + 61752^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3534276 + ... + 3536572.

Almost surely, 2^8120868928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8120868928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8284340556).

8120868928 is an abundant number, since it is smaller than the sum of its proper divisors (8447812184).

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

8120868928 is a wasteful number, since it uses less digits than its factorization.

8120868928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839 (or 3829 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 52.

The square root of 8120868928 is about 90115.8639086371. The cubic root of 8120868928 is about 2010.0221054803.

The spelling of 8120868928 in words is "eight billion, one hundred twenty million, eight hundred sixty-eight thousand, nine hundred twenty-eight".