2189143680 has 256 divisors, whose sum is σ = 7376313600. Its totient is φ = 551124992.

The previous prime is 2189143667. The next prime is 2189143681. The reversal of 2189143680 is 863419812.

It is not an unprimeable number, because it can be changed into a prime (2189143681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3929962 + ... + 3930518.

It is an arithmetic number, because the mean of its divisors is an integer number (28813725).

Almost surely, 2^2189143680 is an apocalyptic number.

2189143680 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 2189143680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3688156800).

2189143680 is an abundant number, since it is smaller than the sum of its proper divisors (5187169920).

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

2189143680 is a wasteful number, since it uses less digits than its factorization.

2189143680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 2189143680 is about 46788.2857134134. The cubic root of 2189143680 is about 1298.4485792504.

The spelling of 2189143680 in words is "two billion, one hundred eighty-nine million, one hundred forty-three thousand, six hundred eighty".