2109840780 has 96 divisors (see below), whose sum is σ = 6133155840. Its totient is φ = 541347840.

The previous prime is 2109840779. The next prime is 2109840791. The reversal of 2109840780 is 870489012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329772 + ... + 336108.

It is an arithmetic number, because the mean of its divisors is an integer number (63887040).

Almost surely, 2^2109840780 is an apocalyptic number.

2109840780 is a gapful number since it is divisible by the number (20) 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 2109840780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3066577920).

2109840780 is an abundant number, since it is smaller than the sum of its proper divisors (4023315060).

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

2109840780 is a wasteful number, since it uses less digits than its factorization.

2109840780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6559 (or 6557 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 2109840780 is about 45933.0031676571. The cubic root of 2109840780 is about 1282.5763498125.

The spelling of 2109840780 in words is "two billion, one hundred nine million, eight hundred forty thousand, seven hundred eighty".