686650338 has 32 divisors (see below), whose sum is σ = 1664608320. Its totient is φ = 208075680.

The previous prime is 686650331. The next prime is 686650339. The reversal of 686650338 is 833056686.

It is a junction number, because it is equal to n+sod(n) for n = 686650293 and 686650302.

It is not an unprimeable number, because it can be changed into a prime (686650331) 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 15 ways as a sum of consecutive naturals, for example, 577395 + ... + 578582.

It is an arithmetic number, because the mean of its divisors is an integer number (52019010).

Almost surely, 2^686650338 is an apocalyptic number.

686650338 is an abundant number, since it is smaller than the sum of its proper divisors (977957982).

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

686650338 is a wasteful number, since it uses less digits than its factorization.

686650338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155999 (or 1155993 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 686650338 is about 26204.0137765190. The cubic root of 686650338 is about 882.2233457243.

The spelling of 686650338 in words is "six hundred eighty-six million, six hundred fifty thousand, three hundred thirty-eight".