86818 has 8 divisors (see below), whose sum is σ = 132048. Its totient is φ = 42804.

The previous prime is 86813. The next prime is 86837. The reversal of 86818 is 81868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 86818.

It is not an unprimeable number, because it can be changed into a prime (86813) by changing a digit.

86818 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96 + ... + 427.

It is an arithmetic number, because the mean of its divisors is an integer number (16506).

2⁸⁶⁸¹⁸ is an apocalyptic number.

86818 is a deficient number, since it is larger than the sum of its proper divisors (45230).

86818 is a wasteful number, since it uses less digits than its factorization.

86818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608.

The product of its digits is 3072, while the sum is 31.

The square root of 86818 is about 294.6489436601. The cubic root of 86818 is about 44.2795561528.

Subtracting from 86818 its reverse (81868), we obtain a triangular number (4950 = T₉₉).

The spelling of 86818 in words is "eighty-six thousand, eight hundred eighteen".