8728456840 has 32 divisors (see below), whose sum is σ = 19684632960. Its totient is φ = 3483275200.

The previous prime is 8728456823. The next prime is 8728456871. The reversal of 8728456840 is 486548278.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235906 + ... + 270385.

It is an arithmetic number, because the mean of its divisors is an integer number (615144780).

Almost surely, 2^8728456840 is an apocalyptic number.

It is an amenable number.

8728456840 is an abundant number, since it is smaller than the sum of its proper divisors (10956176120).

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

8728456840 is a wasteful number, since it uses less digits than its factorization.

8728456840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506733 (or 506729 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 52.

The square root of 8728456840 is about 93426.2106691693. The cubic root of 8728456840 is about 2058.9501075426.

The spelling of 8728456840 in words is "eight billion, seven hundred twenty-eight million, four hundred fifty-six thousand, eight hundred forty".