2189440050 has 144 divisors (see below), whose sum is σ = 6389189280. Its totient is φ = 494672640.

The previous prime is 2189440039. The next prime is 2189440051. The reversal of 2189440050 is 500449812.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2189439993 and 2189440020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189440051) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 652477 + ... + 655823.

It is an arithmetic number, because the mean of its divisors is an integer number (44369370).

Almost surely, 2^2189440050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2189440050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3194594640).

2189440050 is an abundant number, since it is smaller than the sum of its proper divisors (4199749230).

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

2189440050 is a wasteful number, since it uses less digits than its factorization.

2189440050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3465 (or 3453 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 2189440050 is about 46791.4527451328. The cubic root of 2189440050 is about 1298.5071719997.

Adding to 2189440050 its reverse (500449812), we get a palindrome (2689889862).

The spelling of 2189440050 in words is "two billion, one hundred eighty-nine million, four hundred forty thousand, fifty".