8684691860 has 24 divisors (see below), whose sum is σ = 19640765256. Its totient is φ = 3206655360.

The previous prime is 8684691839. The next prime is 8684691901. The reversal of 8684691860 is 681964868.

It can be written as a sum of positive squares in 4 ways, for example, as 381108484 + 8303583376 = 19522^2 + 91124^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8684691796 and 8684691805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16701071 + ... + 16701590.

It is an arithmetic number, because the mean of its divisors is an integer number (818365219).

Almost surely, 2^8684691860 is an apocalyptic number.

It is an amenable number.

8684691860 is an abundant number, since it is smaller than the sum of its proper divisors (10956073396).

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

8684691860 is a wasteful number, since it uses less digits than its factorization.

8684691860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33402683 (or 33402681 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The square root of 8684691860 is about 93191.6941577950. The cubic root of 8684691860 is about 2055.5031089007.

The spelling of 8684691860 in words is "eight billion, six hundred eighty-four million, six hundred ninety-one thousand, eight hundred sixty".