684286 has 4 divisors (see below), whose sum is σ = 1026432. Its totient is φ = 342142.

The previous prime is 684269. The next prime is 684287. The reversal of 684286 is 682486.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684287) by changing a digit.

684286 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, 171070 + ... + 171073.

It is an arithmetic number, because the mean of its divisors is an integer number (256608).

684286 is a Friedman number, since it can be written as 88*6*6^4-2, using all its digits and the basic arithmetic operations.

2⁶⁸⁴²⁸⁶ is an apocalyptic number.

684286 is a deficient number, since it is larger than the sum of its proper divisors (342146).

684286 is a wasteful number, since it uses less digits than its factorization.

684286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342145.

The product of its digits is 18432, while the sum is 34.

The square root of 684286 is about 827.2158122280. The cubic root of 684286 is about 88.1209596927.

The spelling of 684286 in words is "six hundred eighty-four thousand, two hundred eighty-six".