686252368 has 20 divisors (see below), whose sum is σ = 1330444980. Its totient is φ = 342911744.

The previous prime is 686252339. The next prime is 686252387. The reversal of 686252368 is 863252686.

It can be written as a sum of positive squares in 2 ways, for example, as 163123984 + 523128384 = 12772^2 + 22872^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 14796 + ... + 39892.

It is an arithmetic number, because the mean of its divisors is an integer number (66522249).

Almost surely, 2^686252368 is an apocalyptic number.

It is an amenable number.

686252368 is a deficient number, since it is larger than the sum of its proper divisors (644192612).

686252368 is a wasteful number, since it uses less digits than its factorization.

686252368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26814 (or 26808 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

The square root of 686252368 is about 26196.4189919157. The cubic root of 686252368 is about 882.0528726041.

The spelling of 686252368 in words is "six hundred eighty-six million, two hundred fifty-two thousand, three hundred sixty-eight".