393139568 has 10 divisors (see below), whose sum is σ = 761707944. Its totient is φ = 196569776.

The previous prime is 393139561. The next prime is 393139589. The reversal of 393139568 is 865931393.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393139561) by changing a digit.

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 as a sum of consecutive naturals, namely, 12285596 + ... + 12285627.

Almost surely, 2^393139568 is an apocalyptic number.

It is an amenable number.

393139568 is a deficient number, since it is larger than the sum of its proper divisors (368568376).

393139568 is a wasteful number, since it uses less digits than its factorization.

393139568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24571231 (or 24571225 counting only the distinct ones).

The product of its digits is 524880, while the sum is 47.

The square root of 393139568 is about 19827.7474262711. The cubic root of 393139568 is about 732.5696442769.

The spelling of 393139568 in words is "three hundred ninety-three million, one hundred thirty-nine thousand, five hundred sixty-eight".