85816 has 16 divisors (see below), whose sum is σ = 170640. Its totient is φ = 40320.

The previous prime is 85793. The next prime is 85817. The reversal of 85816 is 61858.

It is a happy number.

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

It is a congruent number.

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, 180 + ... + 451.

It is an arithmetic number, because the mean of its divisors is an integer number (10665).

2⁸⁵⁸¹⁶ is an apocalyptic number.

It is an amenable number.

85816 is a deficient number, since it is larger than the sum of its proper divisors (84824).

85816 is a wasteful number, since it uses less digits than its factorization.

85816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 650 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 85816 is about 292.9436805941. The cubic root of 85816 is about 44.1085474217.

The spelling of 85816 in words is "eighty-five thousand, eight hundred sixteen".