2189161128 has 192 divisors, whose sum is σ = 7250112000. Its totient is φ = 535034880.

The previous prime is 2189161109. The next prime is 2189161147. The reversal of 2189161128 is 8211619812.

2189161128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2189161109) and next prime (2189161147).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 532023 + ... + 536121.

It is an arithmetic number, because the mean of its divisors is an integer number (37761000).

Almost surely, 2^2189161128 is an apocalyptic number.

2189161128 is a gapful number since it is divisible by the number (28) 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 2189161128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3625056000).

2189161128 is an abundant number, since it is smaller than the sum of its proper divisors (5060950872).

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

2189161128 is a wasteful number, since it uses less digits than its factorization.

2189161128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4160 (or 4139 counting only the distinct ones).

The product of its digits is 13824, while the sum is 39.

The square root of 2189161128 is about 46788.4721699694. The cubic root of 2189161128 is about 1298.4520288900.

The spelling of 2189161128 in words is "two billion, one hundred eighty-nine million, one hundred sixty-one thousand, one hundred twenty-eight".