393984572 has 12 divisors (see below), whose sum is σ = 719450256. Its totient is φ = 188427360.

The previous prime is 393984559. The next prime is 393984599. The reversal of 393984572 is 275489393.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 393984572.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2141129 + ... + 2141312.

It is an arithmetic number, because the mean of its divisors is an integer number (59954188).

Almost surely, 2^393984572 is an apocalyptic number.

It is an amenable number.

393984572 is a deficient number, since it is larger than the sum of its proper divisors (325465684).

393984572 is a wasteful number, since it uses less digits than its factorization.

393984572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282468 (or 4282466 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 50.

The square root of 393984572 is about 19849.0446117691. The cubic root of 393984572 is about 733.0941240918.

The spelling of 393984572 in words is "three hundred ninety-three million, nine hundred eighty-four thousand, five hundred seventy-two".