8129802072 has 96 divisors (see below), whose sum is σ = 23686153920. Its totient is φ = 2318541120.

The previous prime is 8129802059. The next prime is 8129802089. The reversal of 8129802072 is 2702089218.

It is a self number, because there is not a number n which added to its sum of digits gives 8129802072.

It is a congruent number.

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, 665443 + ... + 677549.

It is an arithmetic number, because the mean of its divisors is an integer number (246730770).

Almost surely, 2^8129802072 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 8129802072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11843076960).

8129802072 is an abundant number, since it is smaller than the sum of its proper divisors (15556351848).

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

8129802072 is a wasteful number, since it uses less digits than its factorization.

8129802072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12701 (or 12690 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 8129802072 is about 90165.4150547759. The cubic root of 8129802072 is about 2010.7588590286.

The spelling of 8129802072 in words is "eight billion, one hundred twenty-nine million, eight hundred two thousand, seventy-two".