1981032988 has 48 divisors (see below), whose sum is σ = 3838464000. Its totient is φ = 887112000.

The previous prime is 1981032973. The next prime is 1981033013. The reversal of 1981032988 is 8892301891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 990013 + ... + 992011.

It is an arithmetic number, because the mean of its divisors is an integer number (79968000).

Almost surely, 2^1981032988 is an apocalyptic number.

It is an amenable number.

1981032988 is a deficient number, since it is larger than the sum of its proper divisors (1857431012).

1981032988 is a wasteful number, since it uses less digits than its factorization.

1981032988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338 (or 2336 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 1981032988 is about 44508.7967485080. The cubic root of 1981032988 is about 1255.9255698182.

The spelling of 1981032988 in words is "one billion, nine hundred eighty-one million, thirty-two thousand, nine hundred eighty-eight".