86540 has 12 divisors (see below), whose sum is σ = 181776. Its totient is φ = 34608.

The previous prime is 86539. The next prime is 86561. The reversal of 86540 is 4568.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2144 + ... + 2183.

It is an arithmetic number, because the mean of its divisors is an integer number (15148).

2⁸⁶⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

86540 is an abundant number, since it is smaller than the sum of its proper divisors (95236).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90888).

86540 is a wasteful number, since it uses less digits than its factorization.

86540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4336 (or 4334 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 86540 is about 294.1768175775. The cubic root of 86540 is about 44.2322430802.

It can be divided in two parts, 86 and 540, that added together give a palindrome (626).

The spelling of 86540 in words is "eighty-six thousand, five hundred forty".