394809 has 8 divisors (see below), whose sum is σ = 532032. Its totient is φ = 260400.

The previous prime is 394787. The next prime is 394811. The reversal of 394809 is 908493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 394809 - 2¹¹ = 392761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394809.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 394809.

It is not an unprimeable number, because it can be changed into a prime (394819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349 + ... + 954.

It is an arithmetic number, because the mean of its divisors is an integer number (66504).

2³⁹⁴⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

394809 is a deficient number, since it is larger than the sum of its proper divisors (137223).

394809 is a wasteful number, since it uses less digits than its factorization.

394809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 394809 is about 628.3382846843. The cubic root of 394809 is about 73.3605110468.

The spelling of 394809 in words is "three hundred ninety-four thousand, eight hundred nine".