2109784272 has 20 divisors (see below), whose sum is σ = 5450276160. Its totient is φ = 703261408.

The previous prime is 2109784199. The next prime is 2109784279. The reversal of 2109784272 is 2724879012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109784279) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21976872 + ... + 21976967.

It is an arithmetic number, because the mean of its divisors is an integer number (272513808).

Almost surely, 2^2109784272 is an apocalyptic number.

It is an amenable number.

2109784272 is an abundant number, since it is smaller than the sum of its proper divisors (3340491888).

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

2109784272 is a wasteful number, since it uses less digits than its factorization.

2109784272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43953850 (or 43953844 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 2109784272 is about 45932.3880502636. The cubic root of 2109784272 is about 1282.5648992689.

The spelling of 2109784272 in words is "two billion, one hundred nine million, seven hundred eighty-four thousand, two hundred seventy-two".