7899297828 has 12 divisors (see below), whose sum is σ = 18431694960. Its totient is φ = 2633099272.

The previous prime is 7899297821. The next prime is 7899297871. The reversal of 7899297828 is 8287929987.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (7899297821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329137398 + ... + 329137421.

It is an arithmetic number, because the mean of its divisors is an integer number (1535974580).

Almost surely, 2^7899297828 is an apocalyptic number.

It is an amenable number.

7899297828 is an abundant number, since it is smaller than the sum of its proper divisors (10532397132).

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

7899297828 is a wasteful number, since it uses less digits than its factorization.

7899297828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658274826 (or 658274824 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 69.

The square root of 7899297828 is about 88877.9940592721. The cubic root of 7899297828 is about 1991.5726924524.

The spelling of 7899297828 in words is "seven billion, eight hundred ninety-nine million, two hundred ninety-seven thousand, eight hundred twenty-eight".