394005 has 8 divisors (see below), whose sum is σ = 630432. Its totient is φ = 210128.

The previous prime is 393997. The next prime is 394007. The reversal of 394005 is 500493.

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

It is a cyclic number.

It is not a de Polignac number, because 394005 - 2³ = 393997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13119 + ... + 13148.

It is an arithmetic number, because the mean of its divisors is an integer number (78804).

2³⁹⁴⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

394005 is a deficient number, since it is larger than the sum of its proper divisors (236427).

394005 is a wasteful number, since it uses less digits than its factorization.

394005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26275.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 394005 is about 627.6981758775. The cubic root of 394005 is about 73.3106794121.

Adding to 394005 its reverse (500493), we get a palindrome (894498).

The spelling of 394005 in words is "three hundred ninety-four thousand, five".