686468 has 6 divisors (see below), whose sum is σ = 1201326. Its totient is φ = 343232.

The previous prime is 686453. The next prime is 686473. The reversal of 686468 is 864686.

It can be written as a sum of positive squares in only one way, i.e., 643204 + 43264 = 802^2 + 208^2 .

It is an unprimeable number.

686468 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85805 + ... + 85812.

It is an arithmetic number, because the mean of its divisors is an integer number (200221).

2⁶⁸⁶⁴⁶⁸ is an apocalyptic number.

It is an amenable number.

686468 is a deficient number, since it is larger than the sum of its proper divisors (514858).

686468 is a wasteful number, since it uses less digits than its factorization.

686468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171621 (or 171619 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 686468 is about 828.5336444587. The cubic root of 686468 is about 88.2145248197.

The spelling of 686468 in words is "six hundred eighty-six thousand, four hundred sixty-eight".