2789189280 has 144 divisors (see below), whose sum is σ = 9536776704. Its totient is φ = 742325760.

The previous prime is 2789189261. The next prime is 2789189327. The reversal of 2789189280 is 829819872.

2789189280 is a `hidden beast` number, since 278 + 91 + 8 + 9 + 280 = 666.

2789189280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 872485 + ... + 875675.

It is an arithmetic number, because the mean of its divisors is an integer number (66227616).

Almost surely, 2^2789189280 is an apocalyptic number.

2789189280 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 2789189280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4768388352).

2789189280 is an abundant number, since it is smaller than the sum of its proper divisors (6747587424).

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

2789189280 is a wasteful number, since it uses less digits than its factorization.

2789189280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819 (or 3808 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 2789189280 is about 52812.7757270909. The cubic root of 2789189280 is about 1407.6434455714.

The spelling of 2789189280 in words is "two billion, seven hundred eighty-nine million, one hundred eighty-nine thousand, two hundred eighty".