686317620 has 48 divisors (see below), whose sum is σ = 2022834240. Its totient is φ = 173385216.

The previous prime is 686317609. The next prime is 686317627. The reversal of 686317620 is 26713686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686317627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299877 + ... + 302156.

It is an arithmetic number, because the mean of its divisors is an integer number (42142380).

Almost surely, 2^686317620 is an apocalyptic number.

686317620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686317620 is an abundant number, since it is smaller than the sum of its proper divisors (1336516620).

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

686317620 is a wasteful number, since it uses less digits than its factorization.

686317620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602064 (or 602062 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 686317620 is about 26197.6643997132. The cubic root of 686317620 is about 882.0808282525.

The spelling of 686317620 in words is "six hundred eighty-six million, three hundred seventeen thousand, six hundred twenty".