686353338 has 40 divisors (see below), whose sum is σ = 1677756960. Its totient is φ = 207985320.

The previous prime is 686353337. The next prime is 686353351. The reversal of 686353338 is 833353686.

686353338 is a `hidden beast` number, since 6 + 8 + 635 + 3 + 3 + 3 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 686353293 and 686353302.

It is not an unprimeable number, because it can be changed into a prime (686353331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 190798 + ... + 194361.

It is an arithmetic number, because the mean of its divisors is an integer number (41943924).

Almost surely, 2^686353338 is an apocalyptic number.

686353338 is an abundant number, since it is smaller than the sum of its proper divisors (991403622).

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

686353338 is a wasteful number, since it uses less digits than its factorization.

686353338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385184 (or 385175 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 686353338 is about 26198.3460928357. The cubic root of 686353338 is about 882.0961300193.

The spelling of 686353338 in words is "six hundred eighty-six million, three hundred fifty-three thousand, three hundred thirty-eight".