393906 has 8 divisors (see below), whose sum is σ = 787824. Its totient is φ = 131300.

The previous prime is 393901. The next prime is 393919. The reversal of 393906 is 609393.

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

393906 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (393901) 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 3 ways as a sum of consecutive naturals, for example, 32820 + ... + 32831.

It is an arithmetic number, because the mean of its divisors is an integer number (98478).

2³⁹³⁹⁰⁶ is an apocalyptic number.

393906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

393906 is a wasteful number, since it uses less digits than its factorization.

393906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65656.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 393906 is about 627.6193113664. The cubic root of 393906 is about 73.3045387411.

The spelling of 393906 in words is "three hundred ninety-three thousand, nine hundred six".