390918 has 16 divisors (see below), whose sum is σ = 853056. Its totient is φ = 118440.

The previous prime is 390893. The next prime is 390953. The reversal of 390918 is 819093.

It is a happy number.

390918 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 inconsummate number, since it does not exist a number n which divided by its sum of digits gives 390918.

It is an unprimeable number.

390918 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 2896 + ... + 3027.

It is an arithmetic number, because the mean of its divisors is an integer number (53316).

2³⁹⁰⁹¹⁸ is an apocalyptic number.

390918 is an abundant number, since it is smaller than the sum of its proper divisors (462138).

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

390918 is a wasteful number, since it uses less digits than its factorization.

390918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5939.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 390918 is about 625.2343560618. The cubic root of 390918 is about 73.1187159477.

The spelling of 390918 in words is "three hundred ninety thousand, nine hundred eighteen".