686863760 has 60 divisors (see below), whose sum is σ = 1755359004. Its totient is φ = 249765120.

The previous prime is 686863757. The next prime is 686863777. The reversal of 686863760 is 67368686.

It can be written as a sum of positive squares in 2 ways, for example, as 187251856 + 499611904 = 13684^2 + 22352^2 .

It is a junction number, because it is equal to n+sod(n) for n = 686863699 and 686863708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25799 + ... + 45158.

Almost surely, 2^686863760 is an apocalyptic number.

It is an amenable number.

686863760 is an abundant number, since it is smaller than the sum of its proper divisors (1068495244).

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

686863760 is a wasteful number, since it uses less digits than its factorization.

686863760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70992 (or 70975 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The square root of 686863760 is about 26208.0857751954. The cubic root of 686863760 is about 882.3147393378.

The spelling of 686863760 in words is "six hundred eighty-six million, eight hundred sixty-three thousand, seven hundred sixty".