856882765 has 12 divisors (see below), whose sum is σ = 1043862876. Its totient is φ = 675257088.

The previous prime is 856882757. The next prime is 856882781. The reversal of 856882765 is 567288658.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 142229476 + 714653289 = 11926^2 + 26733^2 .

It is not a de Polignac number, because 856882765 - 2³ = 856882757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3357 + ... + 41533.

It is an arithmetic number, because the mean of its divisors is an integer number (86988573).

Almost surely, 2^856882765 is an apocalyptic number.

It is an amenable number.

856882765 is a deficient number, since it is larger than the sum of its proper divisors (186980111).

856882765 is an equidigital number, since it uses as much as digits as its factorization.

856882765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38316 (or 38249 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 55.

The square root of 856882765 is about 29272.5599324692. The cubic root of 856882765 is about 949.8181609490.

The spelling of 856882765 in words is "eight hundred fifty-six million, eight hundred eighty-two thousand, seven hundred sixty-five".