390844 has 6 divisors (see below), whose sum is σ = 683984. Its totient is φ = 195420.

The previous prime is 390829. The next prime is 390851. The reversal of 390844 is 448093.

390844 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 as a sum of consecutive naturals, namely, 48852 + ... + 48859.

2³⁹⁰⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

390844 is a deficient number, since it is larger than the sum of its proper divisors (293140).

390844 is a wasteful number, since it uses less digits than its factorization.

390844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97715 (or 97713 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 390844 is about 625.1751754508. The cubic root of 390844 is about 73.1141019140.

The spelling of 390844 in words is "three hundred ninety thousand, eight hundred forty-four".