686000686 has 32 divisors (see below), whose sum is σ = 1212004800. Its totient is φ = 291060000.

The previous prime is 686000671. The next prime is 686000699.

686000686 = 2556² + 2557² + ... + 2656².

686000686 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64336 + ... + 74236.

It is an arithmetic number, because the mean of its divisors is an integer number (37875150).

Almost surely, 2^686000686 is an apocalyptic number.

686000686 is a deficient number, since it is larger than the sum of its proper divisors (526004114).

686000686 is a wasteful number, since it uses less digits than its factorization.

686000686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10025 (or 10011 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 686000686 is about 26191.6148032152. The cubic root of 686000686 is about 881.9450289079.

It can be divided in two parts, 686000 and 686, that added together give a palindrome (686686).

The spelling of 686000686 in words is "six hundred eighty-six million, six hundred eighty-six", and thus it is an aban number.