686848686 has 16 divisors (see below), whose sum is σ = 1410824784. Its totient is φ = 222761664.

The previous prime is 686848667. The next prime is 686848693.

686848686 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×686848686² = 943522234919853192, which contains 22 as substring.

It is a congruent number.

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, 1546735 + ... + 1547178.

It is an arithmetic number, because the mean of its divisors is an integer number (88176549).

Almost surely, 2^686848686 is an apocalyptic number.

686848686 is an abundant number, since it is smaller than the sum of its proper divisors (723976098).

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

686848686 is a wasteful number, since it uses less digits than its factorization.

686848686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093955.

The product of its digits is 21233664, while the sum is 60.

The square root of 686848686 is about 26207.7981906149. The cubic root of 686848686 is about 882.3082848265.

The spelling of 686848686 in words is "six hundred eighty-six million, eight hundred forty-eight thousand, six hundred eighty-six".