1881113844 has 12 divisors (see below), whose sum is σ = 4389265664. Its totient is φ = 627037944.

The previous prime is 1881113783. The next prime is 1881113851. The reversal of 1881113844 is 4483111881.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78379732 + ... + 78379755.

Almost surely, 2^1881113844 is an apocalyptic number.

It is an amenable number.

1881113844 is an abundant number, since it is smaller than the sum of its proper divisors (2508151820).

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

1881113844 is a wasteful number, since it uses less digits than its factorization.

1881113844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156759494 (or 156759492 counting only the distinct ones).

The product of its digits is 24576, while the sum is 39.

The square root of 1881113844 is about 43371.8093235687. The cubic root of 1881113844 is about 1234.4448529088. Note that the first 3 decimals are identical.

The spelling of 1881113844 in words is "one billion, eight hundred eighty-one million, one hundred thirteen thousand, eight hundred forty-four".