390830 has 48 divisors (see below), whose sum is σ = 861840. Its totient is φ = 126720.

The previous prime is 390829. The next prime is 390851. The reversal of 390830 is 38093.

390830 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 390796 and 390805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20561 + ... + 20579.

It is an arithmetic number, because the mean of its divisors is an integer number (17955).

2³⁹⁰⁸³⁰ is an apocalyptic number.

390830 is an abundant number, since it is smaller than the sum of its proper divisors (471010).

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

390830 is a wasteful number, since it uses less digits than its factorization.

390830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 390830 is about 625.1639784888. The cubic root of 390830 is about 73.1132289232.

The spelling of 390830 in words is "three hundred ninety thousand, eight hundred thirty".