8389478756 has 24 divisors (see below), whose sum is σ = 15276885120. Its totient is φ = 4028022752.

The previous prime is 8389478737. The next prime is 8389478789. The reversal of 8389478756 is 6578749838.

It is a junction number, because it is equal to n+sod(n) for n = 8389478692 and 8389478701.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411026 + ... + 430953.

It is an arithmetic number, because the mean of its divisors is an integer number (636536880).

Almost surely, 2^8389478756 is an apocalyptic number.

It is an amenable number.

8389478756 is a deficient number, since it is larger than the sum of its proper divisors (6887406364).

8389478756 is a wasteful number, since it uses less digits than its factorization.

8389478756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842083 (or 842081 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 65.

The square root of 8389478756 is about 91594.0978229493. The cubic root of 8389478756 is about 2031.9436483975.

The spelling of 8389478756 in words is "eight billion, three hundred eighty-nine million, four hundred seventy-eight thousand, seven hundred fifty-six".