684026 has 8 divisors (see below), whose sum is σ = 1172640. Its totient is φ = 293148.

The previous prime is 684017. The next prime is 684037. The reversal of 684026 is 620486.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 683986 and 684004.

It is an unprimeable number.

684026 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 in 3 ways as a sum of consecutive naturals, for example, 24416 + ... + 24443.

It is an arithmetic number, because the mean of its divisors is an integer number (146580).

2⁶⁸⁴⁰²⁶ is an apocalyptic number.

684026 is a deficient number, since it is larger than the sum of its proper divisors (488614).

684026 is a wasteful number, since it uses less digits than its factorization.

684026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48868.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 684026 is about 827.0586436281. The cubic root of 684026 is about 88.1097975218.

The spelling of 684026 in words is "six hundred eighty-four thousand, twenty-six".