85818 has 8 divisors (see below), whose sum is σ = 171648. Its totient is φ = 28604.

The previous prime is 85817. The next prime is 85819. The reversal of 85818 is 81858.

It is an interprime number because it is at equal distance from previous prime (85817) and next prime (85819).

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

85818 is an admirable number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (85817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7146 + ... + 7157.

It is an arithmetic number, because the mean of its divisors is an integer number (21456).

2⁸⁵⁸¹⁸ is an apocalyptic number.

85818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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 (85824).

85818 is a wasteful number, since it uses less digits than its factorization.

85818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14308.

The product of its digits is 2560, while the sum is 30.

The square root of 85818 is about 292.9470941996. The cubic root of 85818 is about 44.1088900789.

It can be divided in two parts, 85 and 818, that added together give a triangular number (903 = T₄₂).

The spelling of 85818 in words is "eighty-five thousand, eight hundred eighteen".