393804 has 18 divisors (see below), whose sum is σ = 995540. Its totient is φ = 131256.

The previous prime is 393797. The next prime is 393847. The reversal of 393804 is 408393.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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, 5434 + ... + 5505.

2³⁹³⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

393804 is an abundant number, since it is smaller than the sum of its proper divisors (601736).

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

393804 is a wasteful number, since it uses less digits than its factorization.

393804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10949 (or 10944 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 393804 is about 627.5380466553. The cubic root of 393804 is about 73.2982109129.

The spelling of 393804 in words is "three hundred ninety-three thousand, eight hundred four".