686086 has 12 divisors (see below), whose sum is σ = 1094148. Its totient is φ = 322592.

The previous prime is 686057. The next prime is 686087. The reversal of 686086 is 680686.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an Ulam number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686087) 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, 16 + ... + 1171.

It is an arithmetic number, because the mean of its divisors is an integer number (91179).

2⁶⁸⁶⁰⁸⁶ is an apocalyptic number.

686086 is a deficient number, since it is larger than the sum of its proper divisors (408062).

686086 is a wasteful number, since it uses less digits than its factorization.

686086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 686086 is about 828.3030846254. The cubic root of 686086 is about 88.1981588220.

The spelling of 686086 in words is "six hundred eighty-six thousand, eighty-six".