393666472 has 32 divisors (see below), whose sum is σ = 783129600. Its totient is φ = 184996224.

The previous prime is 393666463. The next prime is 393666499. The reversal of 393666472 is 274666393.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9108 + ... + 29500.

It is an arithmetic number, because the mean of its divisors is an integer number (24472800).

Almost surely, 2^393666472 is an apocalyptic number.

It is an amenable number.

393666472 is a deficient number, since it is larger than the sum of its proper divisors (389463128).

393666472 is a wasteful number, since it uses less digits than its factorization.

393666472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20545 (or 20541 counting only the distinct ones).

The product of its digits is 979776, while the sum is 46.

The square root of 393666472 is about 19841.0300135855. The cubic root of 393666472 is about 732.8967728534.

The spelling of 393666472 in words is "three hundred ninety-three million, six hundred sixty-six thousand, four hundred seventy-two".