8717947056 has 400 divisors, whose sum is σ = 32138568000. Its totient is φ = 2219083776.

The previous prime is 8717947013. The next prime is 8717947093. The reversal of 8717947056 is 6507497178.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 8717946993 and 8717947011.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3418870 + ... + 3421418.

It is an arithmetic number, because the mean of its divisors is an integer number (80346420).

Almost surely, 2^8717947056 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 8717947056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16069284000).

8717947056 is an abundant number, since it is smaller than the sum of its proper divisors (23420620944).

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

8717947056 is a wasteful number, since it uses less digits than its factorization.

8717947056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618 (or 2603 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The square root of 8717947056 is about 93369.9472849803. The cubic root of 8717947056 is about 2058.1233935653.

The spelling of 8717947056 in words is "eight billion, seven hundred seventeen million, nine hundred forty-seven thousand, fifty-six".