394904 has 8 divisors (see below), whose sum is σ = 740460. Its totient is φ = 197448.

The previous prime is 394897. The next prime is 394931. The reversal of 394904 is 409493.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

394904 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 (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24674 + ... + 24689.

2³⁹⁴⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

394904 is a deficient number, since it is larger than the sum of its proper divisors (345556).

394904 is a wasteful number, since it uses less digits than its factorization.

394904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49369 (or 49365 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 394904 is about 628.4138763586. The cubic root of 394904 is about 73.3663946426.

The spelling of 394904 in words is "three hundred ninety-four thousand, nine hundred four".