9489871872 has 330 divisors, whose sum is σ = 30731516838. Its totient is φ = 2915647488.

The previous prime is 9489871847. The next prime is 9489871877. The reversal of 9489871872 is 2781789849.

9489871872 is a `hidden beast` number, since 9 + 489 + 8 + 71 + 87 + 2 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1154912256 + 8334959616 = 33984^2 + 91296^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9489871877) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 14017198 + ... + 14017874.

Almost surely, 2^9489871872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9489871872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15365758419).

9489871872 is an abundant number, since it is smaller than the sum of its proper divisors (21241644966).

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

9489871872 is a wasteful number, since it uses less digits than its factorization.

9489871872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 695 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 63.

The square root of 9489871872 is about 97415.9733924576. The cubic root of 9489871872 is about 2117.1588760165.

The spelling of 9489871872 in words is "nine billion, four hundred eighty-nine million, eight hundred seventy-one thousand, eight hundred seventy-two".