684234 has 16 divisors (see below), whose sum is σ = 1520640. Its totient is φ = 228060.

The previous prime is 684221. The next prime is 684239. The reversal of 684234 is 432486.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 684198 and 684207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6282 + ... + 6389.

It is an arithmetic number, because the mean of its divisors is an integer number (95040).

2⁶⁸⁴²³⁴ is an apocalyptic number.

684234 is an abundant number, since it is smaller than the sum of its proper divisors (836406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

684234 is a wasteful number, since it uses less digits than its factorization.

684234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12682 (or 12676 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 684234 is about 827.1843808970. The cubic root of 684234 is about 88.1187274847.

The spelling of 684234 in words is "six hundred eighty-four thousand, two hundred thirty-four".