8243686928 has 10 divisors (see below), whose sum is σ = 15972143454. Its totient is φ = 4121843456.

The previous prime is 8243686909. The next prime is 8243686973. The reversal of 8243686928 is 8296863428.

It can be written as a sum of positive squares in only one way, i.e., 6663783424 + 1579903504 = 81632^2 + 39748^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 257615201 + ... + 257615232.

Almost surely, 2^8243686928 is an apocalyptic number.

It is an amenable number.

8243686928 is a deficient number, since it is larger than the sum of its proper divisors (7728456526).

8243686928 is a wasteful number, since it uses less digits than its factorization.

8243686928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515230441 (or 515230435 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 56.

The square root of 8243686928 is about 90794.7516544872. The cubic root of 8243686928 is about 2020.1044719356.

The spelling of 8243686928 in words is "eight billion, two hundred forty-three million, six hundred eighty-six thousand, nine hundred twenty-eight".