390804 has 24 divisors (see below), whose sum is σ = 944160. Its totient is φ = 125664.

The previous prime is 390791. The next prime is 390809. The reversal of 390804 is 408093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390809) 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 7 ways as a sum of consecutive naturals, for example, 214 + ... + 909.

It is an arithmetic number, because the mean of its divisors is an integer number (39340).

2³⁹⁰⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

390804 is an abundant number, since it is smaller than the sum of its proper divisors (553356).

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

390804 is a wasteful number, since it uses less digits than its factorization.

390804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 1157 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 390804 is about 625.1431835988. The cubic root of 390804 is about 73.1116075993. Note that the first 3 decimals are identical.

Adding to 390804 its reverse (408093), we get a palindrome (798897).

The spelling of 390804 in words is "three hundred ninety thousand, eight hundred four".