393644861344 has 192 divisors, whose sum is σ = 923863449600. Its totient is φ = 161539660800.

The previous prime is 393644861297. The next prime is 393644861347. The reversal of 393644861344 is 443168446393.

It is not an unprimeable number, because it can be changed into a prime (393644861347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 547489017 + ... + 547489735.

It is an arithmetic number, because the mean of its divisors is an integer number (4811788800).

Almost surely, 2^393644861344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 393644861344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461931724800).

393644861344 is an abundant number, since it is smaller than the sum of its proper divisors (530218588256).

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

393644861344 is a wasteful number, since it uses less digits than its factorization.

393644861344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347 (or 1339 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 55.

The spelling of 393644861344 in words is "three hundred ninety-three billion, six hundred forty-four million, eight hundred sixty-one thousand, three hundred forty-four".