86857185 has 16 divisors (see below), whose sum is σ = 139089600. Its totient is φ = 46284480.

The previous prime is 86857171. The next prime is 86857193. The reversal of 86857185 is 58175868.

It is not a de Polignac number, because 86857185 - 2²⁶ = 19748321 is a prime.

It is a super-2 number, since 2×86857185² = 15088341172248450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27750 + ... + 30720.

It is an arithmetic number, because the mean of its divisors is an integer number (8693100).

Almost surely, 2^86857185 is an apocalyptic number.

It is an amenable number.

86857185 is a deficient number, since it is larger than the sum of its proper divisors (52232415).

86857185 is a wasteful number, since it uses less digits than its factorization.

86857185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4928.

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

The square root of 86857185 is about 9319.7202211225. The cubic root of 86857185 is about 442.8621695827.

The spelling of 86857185 in words is "eighty-six million, eight hundred fifty-seven thousand, one hundred eighty-five".