856787085 has 192 divisors, whose sum is σ = 1961164800. Its totient is φ = 347276160.

The previous prime is 856787077. The next prime is 856787093. The reversal of 856787085 is 580787658.

It is a happy number.

856787085 is a `hidden beast` number, since 8 + 567 + 8 + 70 + 8 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (856787077) and next prime (856787093).

It is not a de Polignac number, because 856787085 - 2³ = 856787077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6746292 + ... + 6746418.

It is an arithmetic number, because the mean of its divisors is an integer number (10214400).

Almost surely, 2^856787085 is an apocalyptic number.

It is an amenable number.

856787085 is an abundant number, since it is smaller than the sum of its proper divisors (1104377715).

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

856787085 is a wasteful number, since it uses less digits than its factorization.

856787085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 54.

The square root of 856787085 is about 29270.9255917882. The cubic root of 856787085 is about 949.7828072273.

The spelling of 856787085 in words is "eight hundred fifty-six million, seven hundred eighty-seven thousand, eighty-five".