2783865804 has 96 divisors (see below), whose sum is σ = 7030146816. Its totient is φ = 854231040.

The previous prime is 2783865803. The next prime is 2783865823. The reversal of 2783865804 is 4085683872.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (2783865803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1950139 + ... + 1951565.

It is an arithmetic number, because the mean of its divisors is an integer number (73230696).

Almost surely, 2^2783865804 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 2783865804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3515073408).

2783865804 is an abundant number, since it is smaller than the sum of its proper divisors (4246281012).

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

2783865804 is a wasteful number, since it uses less digits than its factorization.

2783865804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655 (or 1653 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 51.

The square root of 2783865804 is about 52762.3521462036. The cubic root of 2783865804 is about 1406.7473275200.

The spelling of 2783865804 in words is "two billion, seven hundred eighty-three million, eight hundred sixty-five thousand, eight hundred four".