393996 has 12 divisors (see below), whose sum is σ = 919352. Its totient is φ = 131328.

The previous prime is 393989. The next prime is 393997. The reversal of 393996 is 699393.

It is a tau number, because it is divible by the number of its divisors (12).

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (393997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16405 + ... + 16428.

2³⁹³⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

393996 is an abundant number, since it is smaller than the sum of its proper divisors (525356).

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

393996 is a wasteful number, since it uses less digits than its factorization.

393996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32840 (or 32838 counting only the distinct ones).

The product of its digits is 39366, while the sum is 39.

The square root of 393996 is about 627.6910067860. The cubic root of 393996 is about 73.3101212118.

The spelling of 393996 in words is "three hundred ninety-three thousand, nine hundred ninety-six".