381567842388 has 36 divisors (see below), whose sum is σ = 964941769428. Its totient is φ = 127133493120.

The previous prime is 381567842339. The next prime is 381567842459. The reversal of 381567842388 is 883248765183.

381567842388 is a `hidden beast` number, since 3 + 81 + 56 + 7 + 8 + 423 + 88 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 139108112784 + 242459729604 = 372972^2 + 492402^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×381567842388³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2241231 + ... + 2405462.

Almost surely, 2^381567842388 is an apocalyptic number.

It is an amenable number.

381567842388 is an abundant number, since it is smaller than the sum of its proper divisors (583373927040).

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

381567842388 is a wasteful number, since it uses less digits than its factorization.

381567842388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4648984 (or 4648979 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 63.

The spelling of 381567842388 in words is "three hundred eighty-one billion, five hundred sixty-seven million, eight hundred forty-two thousand, three hundred eighty-eight".