2789285805 has 18 divisors (see below), whose sum is σ = 4835376234. Its totient is φ = 1487430144.

The previous prime is 2789285803. The next prime is 2789285809. The reversal of 2789285805 is 5085829872.

2789285805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 225180036 + 2564105769 = 15006^2 + 50637^2 .

It is not a de Polignac number, because 2789285805 - 2¹ = 2789285803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2789285803) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 350349 + ... + 358221.

It is an arithmetic number, because the mean of its divisors is an integer number (268632013).

Almost surely, 2^2789285805 is an apocalyptic number.

It is an amenable number.

2789285805 is a deficient number, since it is larger than the sum of its proper divisors (2046090429).

2789285805 is an frugal number, since it uses more digits than its factorization.

2789285805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15757 (or 7881 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The square root of 2789285805 is about 52813.6895605675. The cubic root of 2789285805 is about 1407.6596834100.

The spelling of 2789285805 in words is "two billion, seven hundred eighty-nine million, two hundred eighty-five thousand, eight hundred five".