381317635940 has 72 divisors (see below), whose sum is σ = 846546701112. Its totient is φ = 144257241600.

The previous prime is 381317635939. The next prime is 381317635943. The reversal of 381317635940 is 49536713183.

It can be written as a sum of positive squares in 4 ways, for example, as 149733398116 + 231584237824 = 386954^2 + 481232^2 .

It is not an unprimeable number, because it can be changed into a prime (381317635943) 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 23 ways as a sum of consecutive naturals, for example, 4295282 + ... + 4383158.

It is an arithmetic number, because the mean of its divisors is an integer number (11757593071).

Almost surely, 2^381317635940 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 381317635940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423273350556).

381317635940 is an abundant number, since it is smaller than the sum of its proper divisors (465229065172).

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

381317635940 is a wasteful number, since it uses less digits than its factorization.

381317635940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88525 (or 88504 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 381317635940 in words is "three hundred eighty-one billion, three hundred seventeen million, six hundred thirty-five thousand, nine hundred forty".