306684 has 36 divisors (see below), whose sum is σ = 886704. Its totient is φ = 87552.

The previous prime is 306661. The next prime is 306689. The reversal of 306684 is 486603.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306689) by changing a digit.

306684 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 11 ways as a sum of consecutive naturals, for example, 357 + ... + 860.

2³⁰⁶⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

306684 is an abundant number, since it is smaller than the sum of its proper divisors (580020).

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

306684 is a wasteful number, since it uses less digits than its factorization.

306684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 1229 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 306684 is about 553.7905741343. The cubic root of 306684 is about 67.4368132974.

It can be divided in two parts, 306 and 684, that added together give a triangular number (990 = T₄₄).

The spelling of 306684 in words is "three hundred six thousand, six hundred eighty-four".