1981834944 has 56 divisors (see below), whose sum is σ = 5424434160. Its totient is φ = 637830144.

The previous prime is 1981834937. The next prime is 1981834961. The reversal of 1981834944 is 4494381891.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172399 + ... + 183534.

Almost surely, 2^1981834944 is an apocalyptic number.

It is an amenable number.

1981834944 is an abundant number, since it is smaller than the sum of its proper divisors (3442599216).

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

1981834944 is a wasteful number, since it uses less digits than its factorization.

1981834944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355977 (or 355967 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 1981834944 is about 44517.8047976313. The cubic root of 1981834944 is about 1256.0950203309.

The spelling of 1981834944 in words is "one billion, nine hundred eighty-one million, eight hundred thirty-four thousand, nine hundred forty-four".