1989871300 has 72 divisors (see below), whose sum is σ = 4379094720. Its totient is φ = 784771200.

The previous prime is 1989871297. The next prime is 1989871333. The reversal of 1989871300 is 31789891.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3389607 + ... + 3390193.

It is an arithmetic number, because the mean of its divisors is an integer number (60820760).

Almost surely, 2^1989871300 is an apocalyptic number.

1989871300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989871300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2189547360).

1989871300 is an abundant number, since it is smaller than the sum of its proper divisors (2389223420).

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

1989871300 is a wasteful number, since it uses less digits than its factorization.

1989871300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 1989871300 is about 44607.9735025029. The cubic root of 1989871300 is about 1257.7905555911.

The spelling of 1989871300 in words is "one billion, nine hundred eighty-nine million, eight hundred seventy-one thousand, three hundred".