86505894 has 80 divisors (see below), whose sum is σ = 207938016. Its totient is φ = 26784000.

The previous prime is 86505883. The next prime is 86505919. The reversal of 86505894 is 49850568.

86505894 is a `hidden beast` number, since 8 + 65 + 0 + 589 + 4 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 277999 + ... + 278309.

Almost surely, 2^86505894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86505894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103969008).

86505894 is an abundant number, since it is smaller than the sum of its proper divisors (121432122).

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

86505894 is a wasteful number, since it uses less digits than its factorization.

86505894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 86505894 is about 9300.8544768747. The cubic root of 86505894 is about 442.2643157447.

The spelling of 86505894 in words is "eighty-six million, five hundred five thousand, eight hundred ninety-four".