393391108 has 12 divisors (see below), whose sum is σ = 751019472. Its totient is φ = 178814120.

The previous prime is 393391091. The next prime is 393391109. The reversal of 393391108 is 801193393.

It is not an unprimeable number, because it can be changed into a prime (393391109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4470310 + ... + 4470397.

It is an arithmetic number, because the mean of its divisors is an integer number (62584956).

Almost surely, 2^393391108 is an apocalyptic number.

It is an amenable number.

393391108 is a deficient number, since it is larger than the sum of its proper divisors (357628364).

393391108 is a wasteful number, since it uses less digits than its factorization.

393391108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8940722 (or 8940720 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 393391108 is about 19834.0895430065. The cubic root of 393391108 is about 732.7258494324.

The spelling of 393391108 in words is "three hundred ninety-three million, three hundred ninety-one thousand, one hundred eight".