86856771 has 16 divisors (see below), whose sum is σ = 124208640. Its totient is φ = 53820000.

The previous prime is 86856751. The next prime is 86856773. The reversal of 86856771 is 17765868.

It is not a de Polignac number, because 86856771 - 2⁵ = 86856739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86856771.

It is not an unprimeable number, because it can be changed into a prime (86856773) 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, 11355 + ... + 17396.

It is an arithmetic number, because the mean of its divisors is an integer number (7763040).

Almost surely, 2^86856771 is an apocalyptic number.

86856771 is a deficient number, since it is larger than the sum of its proper divisors (37351869).

86856771 is a wasteful number, since it uses less digits than its factorization.

86856771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28826.

The product of its digits is 564480, while the sum is 48.

The square root of 86856771 is about 9319.6980101289. The cubic root of 86856771 is about 442.8614659555.

The spelling of 86856771 in words is "eighty-six million, eight hundred fifty-six thousand, seven hundred seventy-one".