686115338 has 16 divisors (see below), whose sum is σ = 1040895240. Its totient is φ = 339158016.

The previous prime is 686115337. The next prime is 686115347. The reversal of 686115338 is 833511686.

It can be written as a sum of positive squares in 4 ways, for example, as 640241809 + 45873529 = 25303^2 + 6773^2 .

It is a junction number, because it is equal to n+sod(n) for n = 686115295 and 686115304.

It is not an unprimeable number, because it can be changed into a prime (686115337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327398 + ... + 329486.

Almost surely, 2^686115338 is an apocalyptic number.

686115338 is a deficient number, since it is larger than the sum of its proper divisors (354779902).

686115338 is a wasteful number, since it uses less digits than its factorization.

686115338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881.

The product of its digits is 103680, while the sum is 41.

The square root of 686115338 is about 26193.8034275284. The cubic root of 686115338 is about 881.9941596307.

The spelling of 686115338 in words is "six hundred eighty-six million, one hundred fifteen thousand, three hundred thirty-eight".