393392218868 has 24 divisors (see below), whose sum is σ = 783674619840. Its totient is φ = 171040094720.

The previous prime is 393392218841. The next prime is 393392218897. The reversal of 393392218868 is 868812293393.

It is a self number, because there is not a number n which added to its sum of digits gives 393392218868.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194362733 + ... + 194364756.

It is an arithmetic number, because the mean of its divisors is an integer number (32653109160).

Almost surely, 2^393392218868 is an apocalyptic number.

It is an amenable number.

393392218868 is a deficient number, since it is larger than the sum of its proper divisors (390282400972).

393392218868 is a wasteful number, since it uses less digits than its factorization.

393392218868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388727527 (or 388727525 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 62.

The spelling of 393392218868 in words is "three hundred ninety-three billion, three hundred ninety-two million, two hundred eighteen thousand, eight hundred sixty-eight".