856185087 has 16 divisors (see below), whose sum is σ = 1205932160. Its totient is φ = 538827552.

The previous prime is 856185061. The next prime is 856185101. The reversal of 856185087 is 780581658.

It is not a de Polignac number, because 856185087 - 2¹¹ = 856183039 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856185007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10408 + ... + 42669.

It is an arithmetic number, because the mean of its divisors is an integer number (75370760).

Almost surely, 2^856185087 is an apocalyptic number.

856185087 is a deficient number, since it is larger than the sum of its proper divisors (349747073).

856185087 is a wasteful number, since it uses less digits than its factorization.

856185087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53382.

The product of its (nonzero) digits is 537600, while the sum is 48.

The square root of 856185087 is about 29260.6405774036. The cubic root of 856185087 is about 949.5603088086.

The spelling of 856185087 in words is "eight hundred fifty-six million, one hundred eighty-five thousand, eighty-seven".