8447959872 has 336 divisors, whose sum is σ = 28269663552. Its totient is φ = 2383626240.

The previous prime is 8447959859. The next prime is 8447959913. The reversal of 8447959872 is 2789597448.

8447959872 is a `hidden beast` number, since 8 + 4 + 479 + 5 + 98 + 72 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11524818 + ... + 11525550.

Almost surely, 2^8447959872 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 8447959872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14134831776).

8447959872 is an abundant number, since it is smaller than the sum of its proper divisors (19821703680).

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

8447959872 is a wasteful number, since it uses less digits than its factorization.

8447959872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 873 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The square root of 8447959872 is about 91912.7840509687. The cubic root of 8447959872 is about 2036.6541231512.

The spelling of 8447959872 in words is "eight billion, four hundred forty-seven million, nine hundred fifty-nine thousand, eight hundred seventy-two".