686854216 has 16 divisors (see below), whose sum is σ = 1303369200. Its totient is φ = 339289104.

The previous prime is 686854211. The next prime is 686854249. The reversal of 686854216 is 612458686.

It is not an unprimeable number, because it can be changed into a prime (686854211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516546 + ... + 517873.

It is an arithmetic number, because the mean of its divisors is an integer number (81460575).

Almost surely, 2^686854216 is an apocalyptic number.

It is an amenable number.

686854216 is a deficient number, since it is larger than the sum of its proper divisors (616514984).

686854216 is a wasteful number, since it uses less digits than its factorization.

686854216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034508 (or 1034504 counting only the distinct ones).

The product of its digits is 552960, while the sum is 46.

The square root of 686854216 is about 26207.9036933517. The cubic root of 686854216 is about 882.3106527191.

The spelling of 686854216 in words is "six hundred eighty-six million, eight hundred fifty-four thousand, two hundred sixteen".