394404 has 24 divisors (see below), whose sum is σ = 960960. Its totient is φ = 125664.

The previous prime is 394393. The next prime is 394409. The reversal of 394404 is 404493.

394404 = T₃₁₀ + T₃₁₁ + ... + T₃₁₇.

394404 is nontrivially palindromic in base 14.

394404 is an undulating number in base 14.

It is not an unprimeable number, because it can be changed into a prime (394409) by changing a digit.

394404 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439 + ... + 990.

It is an arithmetic number, because the mean of its divisors is an integer number (40040).

2³⁹⁴⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

394404 is an abundant number, since it is smaller than the sum of its proper divisors (566556).

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

394404 is a wasteful number, since it uses less digits than its factorization.

394404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459 (or 1457 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 394404 is about 628.0159233650. The cubic root of 394404 is about 73.3354177553.

Adding to 394404 its reverse (404493), we get a palindrome (798897).

The spelling of 394404 in words is "three hundred ninety-four thousand, four hundred four".