9939880856 has 48 divisors (see below), whose sum is σ = 19770791040. Its totient is φ = 4684196160.

The previous prime is 9939880849. The next prime is 9939880901. The reversal of 9939880856 is 6580889399.

It is a junction number, because it is equal to n+sod(n) for n = 9939880792 and 9939880801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 560201 + ... + 577671.

It is an arithmetic number, because the mean of its divisors is an integer number (411891480).

Almost surely, 2^9939880856 is an apocalyptic number.

It is an amenable number.

9939880856 is a deficient number, since it is larger than the sum of its proper divisors (9830910184).

9939880856 is a wasteful number, since it uses less digits than its factorization.

9939880856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17712 (or 17689 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 65.

The square root of 9939880856 is about 99698.9511278830. The cubic root of 9939880856 is about 2150.1085833749.

The spelling of 9939880856 in words is "nine billion, nine hundred thirty-nine million, eight hundred eighty thousand, eight hundred fifty-six".