2381381856 has 120 divisors (see below), whose sum is σ = 8004150000. Its totient is φ = 680389632.

The previous prime is 2381381851. The next prime is 2381381887. The reversal of 2381381856 is 6581831832.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2381381851) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47481 + ... + 83768.

It is an arithmetic number, because the mean of its divisors is an integer number (66701250).

Almost surely, 2^2381381856 is an apocalyptic number.

It is an amenable number.

2381381856 is an abundant number, since it is smaller than the sum of its proper divisors (5622768144).

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

2381381856 is a wasteful number, since it uses less digits than its factorization.

2381381856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131278 (or 131261 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 2381381856 is about 48799.4042586587. The cubic root of 2381381856 is about 1335.3947980188.

The spelling of 2381381856 in words is "two billion, three hundred eighty-one million, three hundred eighty-one thousand, eight hundred fifty-six".