686492 has 12 divisors (see below), whose sum is σ = 1218336. Its totient is φ = 338400.

The previous prime is 686479. The next prime is 686503. The reversal of 686492 is 294686.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686492.

It is an unprimeable number.

686492 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 884 + ... + 1467.

It is an arithmetic number, because the mean of its divisors is an integer number (101528).

2⁶⁸⁶⁴⁹² is an apocalyptic number.

It is an amenable number.

686492 is a deficient number, since it is larger than the sum of its proper divisors (531844).

686492 is a wasteful number, since it uses less digits than its factorization.

686492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428 (or 2426 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 686492 is about 828.5481277512. The cubic root of 686492 is about 88.2155528471.

The spelling of 686492 in words is "six hundred eighty-six thousand, four hundred ninety-two".