2189746650 has 192 divisors, whose sum is σ = 6799564800. Its totient is φ = 454014720.

The previous prime is 2189746649. The next prime is 2189746651. The reversal of 2189746650 is 566479812.

It is an interprime number because it is at equal distance from previous prime (2189746649) and next prime (2189746651).

It is a self number, because there is not a number n which added to its sum of digits gives 2189746650.

It is not an unprimeable number, because it can be changed into a prime (2189746651) 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 95 ways as a sum of consecutive naturals, for example, 803991 + ... + 806709.

It is an arithmetic number, because the mean of its divisors is an integer number (35414400).

Almost surely, 2^2189746650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2189746650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3399782400).

2189746650 is an abundant number, since it is smaller than the sum of its proper divisors (4609818150).

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

2189746650 is a wasteful number, since it uses less digits than its factorization.

2189746650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813 (or 2808 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 2189746650 is about 46794.7288698204. The cubic root of 2189746650 is about 1298.5677816697.

The spelling of 2189746650 in words is "two billion, one hundred eighty-nine million, seven hundred forty-six thousand, six hundred fifty".