393446668 has 12 divisors (see below), whose sum is σ = 710742592. Its totient is φ = 190377360.

The previous prime is 393446653. The next prime is 393446687. The reversal of 393446668 is 866644393.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1586355 + ... + 1586602.

Almost surely, 2^393446668 is an apocalyptic number.

It is an amenable number.

393446668 is a deficient number, since it is larger than the sum of its proper divisors (317295924).

393446668 is a wasteful number, since it uses less digits than its factorization.

393446668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172992 (or 3172990 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 49.

The square root of 393446668 is about 19835.4901124222. The cubic root of 393446668 is about 732.7603429521.

The spelling of 393446668 in words is "three hundred ninety-three million, four hundred forty-six thousand, six hundred sixty-eight".