8647313220 has 576 divisors, whose sum is σ = 35199843840. Its totient is φ = 1743565824.

The previous prime is 8647313183. The next prime is 8647313221. The reversal of 8647313220 is 223137468.

It is a happy number.

8647313220 is a `hidden beast` number, since 8 + 647 + 3 + 1 + 3 + 2 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (8647313221) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7910994 + ... + 7912086.

It is an arithmetic number, because the mean of its divisors is an integer number (61110840).

Almost surely, 2^8647313220 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 8647313220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17599921920).

8647313220 is an abundant number, since it is smaller than the sum of its proper divisors (26552530620).

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

8647313220 is a wasteful number, since it uses less digits than its factorization.

8647313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161 (or 1146 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 8647313220 is about 92990.9308481209. The cubic root of 8647313220 is about 2052.5499278452.

The spelling of 8647313220 in words is "eight billion, six hundred forty-seven million, three hundred thirteen thousand, two hundred twenty".