686944312 has 32 divisors (see below), whose sum is σ = 1362977280. Its totient is φ = 323905120.

The previous prime is 686944309. The next prime is 686944333. The reversal of 686944312 is 213449686.

It is a happy number.

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, 13228 + ... + 39355.

It is an arithmetic number, because the mean of its divisors is an integer number (42593040).

Almost surely, 2^686944312 is an apocalyptic number.

It is an amenable number.

686944312 is a deficient number, since it is larger than the sum of its proper divisors (676032968).

686944312 is a wasteful number, since it uses less digits than its factorization.

686944312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52683 (or 52679 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The square root of 686944312 is about 26209.6225077737. The cubic root of 686944312 is about 882.3492291657.

The spelling of 686944312 in words is "six hundred eighty-six million, nine hundred forty-four thousand, three hundred twelve".