393988290432 has 64 divisors (see below), whose sum is σ = 1141670626560. Its totient is φ = 119390389760.

The previous prime is 393988290427. The next prime is 393988290439. The reversal of 393988290432 is 234092889393.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393988290439) 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 7 ways as a sum of consecutive naturals, for example, 46632648 + ... + 46641095.

It is an arithmetic number, because the mean of its divisors is an integer number (17838603540).

Almost surely, 2^393988290432 is an apocalyptic number.

393988290432 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

393988290432 is an abundant number, since it is smaller than the sum of its proper divisors (747682336128).

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

393988290432 is a wasteful number, since it uses less digits than its factorization.

393988290432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93273771 (or 93273759 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 60.

The spelling of 393988290432 in words is "three hundred ninety-three billion, nine hundred eighty-eight million, two hundred ninety thousand, four hundred thirty-two".