390789 has 12 divisors (see below), whose sum is σ = 645216. Its totient is φ = 223272.

The previous prime is 390781. The next prime is 390791. The reversal of 390789 is 987093.

It is not a de Polignac number, because 390789 - 2³ = 390781 is a prime.

390789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390781) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3039 + ... + 3164.

It is an arithmetic number, because the mean of its divisors is an integer number (53768).

2³⁹⁰⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

390789 is a deficient number, since it is larger than the sum of its proper divisors (254427).

390789 is a wasteful number, since it uses less digits than its factorization.

390789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216 (or 6213 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 390789 is about 625.1311862321. The cubic root of 390789 is about 73.1106721874.

The spelling of 390789 in words is "three hundred ninety thousand, seven hundred eighty-nine".