393845640132 has 192 divisors, whose sum is σ = 1176734490624. Its totient is φ = 99875973120.

The previous prime is 393845640127. The next prime is 393845640163. The reversal of 393845640132 is 231046548393.

It is a super-2 number, since 2×393845640132² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2247478 + ... + 2416370.

It is an arithmetic number, because the mean of its divisors is an integer number (6128825472).

Almost surely, 2^393845640132 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 393845640132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (588367245312).

393845640132 is an abundant number, since it is smaller than the sum of its proper divisors (782888850492).

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

393845640132 is a wasteful number, since it uses less digits than its factorization.

393845640132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169018 (or 169016 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 393845640132 in words is "three hundred ninety-three billion, eight hundred forty-five million, six hundred forty thousand, one hundred thirty-two".