85990 has 8 divisors (see below), whose sum is σ = 154800. Its totient is φ = 34392.

The previous prime is 85933. The next prime is 85991. The reversal of 85990 is 9958.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4290 + ... + 4309.

It is an arithmetic number, because the mean of its divisors is an integer number (19350).

2⁸⁵⁹⁹⁰ is an apocalyptic number.

85990 is a deficient number, since it is larger than the sum of its proper divisors (68810).

85990 is a wasteful number, since it uses less digits than its factorization.

85990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8606.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 85990 is about 293.2405156182. The cubic root of 85990 is about 44.1383387035.

It can be divided in two parts, 859 and 90, that added together give a palindrome (949).

The spelling of 85990 in words is "eighty-five thousand, nine hundred ninety".