8728678815 has 32 divisors (see below), whose sum is σ = 14965606656. Its totient is φ = 4328655360.

The previous prime is 8728678801. The next prime is 8728678877. The reversal of 8728678815 is 5188768278.

It is not a de Polignac number, because 8728678815 - 2¹⁷ = 8728547743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185041 + ... + 227370.

It is an arithmetic number, because the mean of its divisors is an integer number (467675208).

Almost surely, 2^8728678815 is an apocalyptic number.

8728678815 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

8728678815 is a deficient number, since it is larger than the sum of its proper divisors (6236927841).

8728678815 is a wasteful number, since it uses less digits than its factorization.

8728678815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412519.

The product of its digits is 12042240, while the sum is 60.

The square root of 8728678815 is about 93427.3986312367. The cubic root of 8728678815 is about 2058.9675612416.

The spelling of 8728678815 in words is "eight billion, seven hundred twenty-eight million, six hundred seventy-eight thousand, eight hundred fifteen".