394805 has 6 divisors (see below), whose sum is σ = 475458. Its totient is φ = 314720.

The previous prime is 394787. The next prime is 394811. The reversal of 394805 is 508493.

It can be written as a sum of positive squares in 3 ways, for example, as 91204 + 303601 = 302^2 + 551^2 .

It is not a de Polignac number, because 394805 - 2⁸ = 394549 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 394805.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1265 + ... + 1545.

It is an arithmetic number, because the mean of its divisors is an integer number (79243).

2³⁹⁴⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

394805 is a deficient number, since it is larger than the sum of its proper divisors (80653).

394805 is an frugal number, since it uses more digits than its factorization.

394805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 394805 is about 628.3351016774. The cubic root of 394805 is about 73.3602632958.

The spelling of 394805 in words is "three hundred ninety-four thousand, eight hundred five".