393893216 has 24 divisors (see below), whose sum is σ = 809195184. Its totient is φ = 188383360.

The previous prime is 393893207. The next prime is 393893293. The reversal of 393893216 is 612398393.

It is a super-3 number, since 3×393893216³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 266855 + ... + 268326.

It is an arithmetic number, because the mean of its divisors is an integer number (33716466).

Almost surely, 2^393893216 is an apocalyptic number.

It is an amenable number.

393893216 is an abundant number, since it is smaller than the sum of its proper divisors (415301968).

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

393893216 is a wasteful number, since it uses less digits than its factorization.

393893216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535214 (or 535206 counting only the distinct ones).

The product of its digits is 209952, while the sum is 44.

The square root of 393893216 is about 19846.7432088995. The cubic root of 393893216 is about 733.0374571318.

The spelling of 393893216 in words is "three hundred ninety-three million, eight hundred ninety-three thousand, two hundred sixteen".