8687743218 has 144 divisors (see below), whose sum is σ = 24926481216. Its totient is φ = 2158390080.

The previous prime is 8687743201. The next prime is 8687743219. The reversal of 8687743218 is 8123477868.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8687743219) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 203680 + ... + 242612.

It is an arithmetic number, because the mean of its divisors is an integer number (173100564).

Almost surely, 2^8687743218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8687743218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12463240608).

8687743218 is an abundant number, since it is smaller than the sum of its proper divisors (16238737998).

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

8687743218 is a wasteful number, since it uses less digits than its factorization.

8687743218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38989 (or 38979 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The square root of 8687743218 is about 93208.0641253749. The cubic root of 8687743218 is about 2055.7438137155.

The spelling of 8687743218 in words is "eight billion, six hundred eighty-seven million, seven hundred forty-three thousand, two hundred eighteen".