2785857705 has 24 divisors (see below), whose sum is σ = 5007667392. Its totient is φ = 1485790128.

The previous prime is 2785857703. The next prime is 2785857713. The reversal of 2785857705 is 5077585872.

It is not a de Polignac number, because 2785857705 - 2¹ = 2785857703 is a prime.

It is a super-2 number, since 2×2785857705² = 15522006305015734050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2785857703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1145229 + ... + 1147658.

It is an arithmetic number, because the mean of its divisors is an integer number (208652808).

Almost surely, 2^2785857705 is an apocalyptic number.

It is an amenable number.

2785857705 is a deficient number, since it is larger than the sum of its proper divisors (2221809687).

2785857705 is an equidigital number, since it uses as much as digits as its factorization.

2785857705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292907 (or 2292895 counting only the distinct ones).

The product of its (nonzero) digits is 5488000, while the sum is 54.

The square root of 2785857705 is about 52781.2249289461. The cubic root of 2785857705 is about 1407.0827643496.

The spelling of 2785857705 in words is "two billion, seven hundred eighty-five million, eight hundred fifty-seven thousand, seven hundred five".