9889808056 has 128 divisors (see below), whose sum is σ = 20272032000. Its totient is φ = 4513646592.

The previous prime is 9889808029. The next prime is 9889808057. The reversal of 9889808056 is 6508089889.

It is a junction number, because it is equal to n+sod(n) for n = 9889807985 and 9889808003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9889808057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62992330 + ... + 62992486.

It is an arithmetic number, because the mean of its divisors is an integer number (158375250).

Almost surely, 2^9889808056 is an apocalyptic number.

It is an amenable number.

9889808056 is an abundant number, since it is smaller than the sum of its proper divisors (10382223944).

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

9889808056 is a wasteful number, since it uses less digits than its factorization.

9889808056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 61.

The square root of 9889808056 is about 99447.5140765218. The cubic root of 9889808056 is about 2146.4920662016.

The spelling of 9889808056 in words is "nine billion, eight hundred eighty-nine million, eight hundred eight thousand, fifty-six".