2189120688 has 160 divisors (see below), whose sum is σ = 6503313920. Its totient is φ = 704505600.

The previous prime is 2189120677. The next prime is 2189120711. The reversal of 2189120688 is 8860219812.

It is a happy 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, 2413131 + ... + 2414037.

It is an arithmetic number, because the mean of its divisors is an integer number (40645712).

Almost surely, 2^2189120688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2189120688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3251656960).

2189120688 is an abundant number, since it is smaller than the sum of its proper divisors (4314193232).

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

2189120688 is a wasteful number, since it uses less digits than its factorization.

2189120688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112 (or 1100 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 2189120688 is about 46788.0400102419. The cubic root of 2189120688 is about 1298.4440334799. Note that the first 3 decimals are identical.

The spelling of 2189120688 in words is "two billion, one hundred eighty-nine million, one hundred twenty thousand, six hundred eighty-eight".