686040338 has 24 divisors (see below), whose sum is σ = 1101147600. Its totient is φ = 320482368.

The previous prime is 686040337. The next prime is 686040359. The reversal of 686040338 is 833040686.

It is not an unprimeable number, because it can be changed into a prime (686040337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76073 + ... + 84611.

It is an arithmetic number, because the mean of its divisors is an integer number (45881150).

Almost surely, 2^686040338 is an apocalyptic number.

686040338 is a deficient number, since it is larger than the sum of its proper divisors (415107262).

686040338 is a wasteful number, since it uses less digits than its factorization.

686040338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8714 (or 8697 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 686040338 is about 26192.3717520961. The cubic root of 686040338 is about 881.9620212187.

It can be divided in two parts, 68 and 6040338, that added together give a palindrome (6040406).

The spelling of 686040338 in words is "six hundred eighty-six million, forty thousand, three hundred thirty-eight".