686832938 has 16 divisors (see below), whose sum is σ = 1183062240. Its totient is φ = 295765200.

The previous prime is 686832911. The next prime is 686832941. The reversal of 686832938 is 839238686.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 686832938.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821153 + ... + 821988.

It is an arithmetic number, because the mean of its divisors is an integer number (73941390).

Almost surely, 2^686832938 is an apocalyptic number.

686832938 is a deficient number, since it is larger than the sum of its proper divisors (496229302).

686832938 is a wasteful number, since it uses less digits than its factorization.

686832938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643173.

The product of its digits is 2985984, while the sum is 53.

The square root of 686832938 is about 26207.4977439663. The cubic root of 686832938 is about 882.3015416154.

The spelling of 686832938 in words is "six hundred eighty-six million, eight hundred thirty-two thousand, nine hundred thirty-eight".