85810 has 8 divisors (see below), whose sum is σ = 154476. Its totient is φ = 34320.

The previous prime is 85793. The next prime is 85817. The reversal of 85810 is 1858.

It can be written as a sum of positive squares in 2 ways, for example, as 69169 + 16641 = 263^2 + 129^2 .

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

It is a super-2 number, since 2×85810² = 14726712200, which contains 22 as substring.

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

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, 4281 + ... + 4300.

2⁸⁵⁸¹⁰ is an apocalyptic number.

85810 is a deficient number, since it is larger than the sum of its proper divisors (68666).

85810 is a wasteful number, since it uses less digits than its factorization.

85810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8588.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 85810 is about 292.9334395387. The cubic root of 85810 is about 44.1075194182.

It can be divided in two parts, 858 and 10, that added together give a palindrome (868).

The spelling of 85810 in words is "eighty-five thousand, eight hundred ten".