2189881680 has 160 divisors (see below), whose sum is σ = 7775883264. Its totient is φ = 499419648.

The previous prime is 2189881679. The next prime is 2189881703. The reversal of 2189881680 is 861889812.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 917769 + ... + 920151.

Almost surely, 2^2189881680 is an apocalyptic number.

2189881680 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 2189881680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3887941632).

2189881680 is an abundant number, since it is smaller than the sum of its proper divisors (5586001584).

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

2189881680 is a wasteful number, since it uses less digits than its factorization.

2189881680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953 (or 2947 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 51.

The square root of 2189881680 is about 46796.1716382868. The cubic root of 2189881680 is about 1298.5944730381.

The spelling of 2189881680 in words is "two billion, one hundred eighty-nine million, eight hundred eighty-one thousand, six hundred eighty".