393512238368 has 54 divisors (see below), whose sum is σ = 780448842747. Its totient is φ = 195313623040.

The previous prime is 393512238367. The next prime is 393512238401. The reversal of 393512238368 is 863832215393.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 383175856144 + 10336382224 = 619012^2 + 101668^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=443572.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393512238367) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 613903328 + ... + 613903968.

Almost surely, 2^393512238368 is an apocalyptic number.

It is an amenable number.

393512238368 is a deficient number, since it is larger than the sum of its proper divisors (386936604379).

393512238368 is an frugal number, since it uses more digits than its factorization.

393512238368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638 (or 816 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 53.

The spelling of 393512238368 in words is "three hundred ninety-three billion, five hundred twelve million, two hundred thirty-eight thousand, three hundred sixty-eight".