2782320085 has 4 divisors (see below), whose sum is σ = 3338784108. Its totient is φ = 2225856064.

The previous prime is 2782320083. The next prime is 2782320103. The reversal of 2782320085 is 5800232872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1621350756 + 1160969329 = 40266^2 + 34073^2 .

It is a cyclic number.

It is not a de Polignac number, because 2782320085 - 2¹ = 2782320083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2782320083) 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 3 ways as a sum of consecutive naturals, for example, 278232004 + ... + 278232013.

It is an arithmetic number, because the mean of its divisors is an integer number (834696027).

Almost surely, 2^2782320085 is an apocalyptic number.

It is an amenable number.

2782320085 is a deficient number, since it is larger than the sum of its proper divisors (556464023).

2782320085 is an equidigital number, since it uses as much as digits as its factorization.

2782320085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556464022.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 2782320085 is about 52747.7021774409. The cubic root of 2782320085 is about 1406.4869176206.

The spelling of 2782320085 in words is "two billion, seven hundred eighty-two million, three hundred twenty thousand, eighty-five".