686504216 has 24 divisors (see below), whose sum is σ = 1322945820. Its totient is φ = 333969696.

The previous prime is 686504213. The next prime is 686504227. The reversal of 686504216 is 612405686.

It is a self number, because there is not a number n which added to its sum of digits gives 686504216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686504213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20390 + ... + 42293.

Almost surely, 2^686504216 is an apocalyptic number.

It is an amenable number.

686504216 is a deficient number, since it is larger than the sum of its proper divisors (636441604).

686504216 is a wasteful number, since it uses less digits than its factorization.

686504216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62763 (or 62722 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 686504216 is about 26201.2254675235. The cubic root of 686504216 is about 882.1607610393.

The spelling of 686504216 in words is "six hundred eighty-six million, five hundred four thousand, two hundred sixteen".