686798 has 8 divisors (see below), whose sum is σ = 1177392. Its totient is φ = 294336.

The previous prime is 686797. The next prime is 686801. The reversal of 686798 is 897686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24515 + ... + 24542.

It is an arithmetic number, because the mean of its divisors is an integer number (147174).

2⁶⁸⁶⁷⁹⁸ is an apocalyptic number.

686798 is a deficient number, since it is larger than the sum of its proper divisors (490594).

686798 is a wasteful number, since it uses less digits than its factorization.

686798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49066.

The product of its digits is 145152, while the sum is 44.

The square root of 686798 is about 828.7327675433. The cubic root of 686798 is about 88.2286580979.

It can be divided in two parts, 68 and 6798, that multiplied together give a palindrome (462264).

The spelling of 686798 in words is "six hundred eighty-six thousand, seven hundred ninety-eight".