2144091940 has 12 divisors (see below), whose sum is σ = 4502593116. Its totient is φ = 857636768.

The previous prime is 2144091931. The next prime is 2144091941. The reversal of 2144091940 is 491904412.

It can be written as a sum of positive squares in 2 ways, for example, as 1016206884 + 1127885056 = 31878^2 + 33584^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2144091896 and 2144091905.

It is not an unprimeable number, because it can be changed into a prime (2144091941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53602279 + ... + 53602318.

It is an arithmetic number, because the mean of its divisors is an integer number (375216093).

Almost surely, 2^2144091940 is an apocalyptic number.

2144091940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2144091940 is an abundant number, since it is smaller than the sum of its proper divisors (2358501176).

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

2144091940 is a wasteful number, since it uses less digits than its factorization.

2144091940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107204606 (or 107204604 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 2144091940 is about 46304.3404013058. The cubic root of 2144091940 is about 1289.4795769464.

The spelling of 2144091940 in words is "two billion, one hundred forty-four million, ninety-one thousand, nine hundred forty".