390684 has 24 divisors (see below), whose sum is σ = 1042048. Its totient is φ = 111600.

The previous prime is 390673. The next prime is 390703. The reversal of 390684 is 486093.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 2242 + ... + 2409.

2³⁹⁰⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

390684 is an abundant number, since it is smaller than the sum of its proper divisors (651364).

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

390684 is a wasteful number, since it uses less digits than its factorization.

390684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665 (or 4663 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 390684 is about 625.0471982179. The cubic root of 390684 is about 73.1041236337.

The spelling of 390684 in words is "three hundred ninety thousand, six hundred eighty-four".