1980971888 has 40 divisors (see below), whose sum is σ = 4388632800. Its totient is φ = 848563200.

The previous prime is 1980971857. The next prime is 1980971917. The reversal of 1980971888 is 8881790891.

It is a happy number.

It is a congruent number.

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, 338588 + ... + 344388.

It is an arithmetic number, because the mean of its divisors is an integer number (109715820).

Almost surely, 2^1980971888 is an apocalyptic number.

It is an amenable number.

1980971888 is an abundant number, since it is smaller than the sum of its proper divisors (2407660912).

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

1980971888 is a wasteful number, since it uses less digits than its factorization.

1980971888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8865 (or 8859 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 59.

The square root of 1980971888 is about 44508.1103620453. The cubic root of 1980971888 is about 1255.9126577261.

The spelling of 1980971888 in words is "one billion, nine hundred eighty million, nine hundred seventy-one thousand, eight hundred eighty-eight".