8129808 has 140 divisors (see below), whose sum is σ = 25615548. Its totient is φ = 2488320.

The previous prime is 8129801. The next prime is 8129819. The reversal of 8129808 is 8089218.

8129808 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2985984 + 5143824 = 1728^2 + 2268^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (8129801) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 198268 + ... + 198308.

Almost surely, 2^8129808 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 8129808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12807774).

8129808 is an abundant number, since it is smaller than the sum of its proper divisors (17485740).

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

8129808 is a wasteful number, since it uses less digits than its factorization.

8129808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 8129808 is about 2851.2818170079. The cubic root of 8129808 is about 201.0759347756.

The spelling of 8129808 in words is "eight million, one hundred twenty-nine thousand, eight hundred eight".