686843876 has 12 divisors (see below), whose sum is σ = 1234462908. Its totient is φ = 334140192.

The previous prime is 686843869. The next prime is 686843881. The reversal of 686843876 is 678348686.

686843876 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 478734400 + 208109476 = 21880^2 + 14426^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2320271 + ... + 2320566.

It is an arithmetic number, because the mean of its divisors is an integer number (102871909).

Almost surely, 2^686843876 is an apocalyptic number.

It is an amenable number.

686843876 is a deficient number, since it is larger than the sum of its proper divisors (547619032).

686843876 is a wasteful number, since it uses less digits than its factorization.

686843876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4640878 (or 4640876 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 56.

The square root of 686843876 is about 26207.7064238746. The cubic root of 686843876 is about 882.3062252206.

The spelling of 686843876 in words is "six hundred eighty-six million, eight hundred forty-three thousand, eight hundred seventy-six".