85121844 has 24 divisors (see below), whose sum is σ = 205467360. Its totient is φ = 27395424.

The previous prime is 85121833. The next prime is 85121849. The reversal of 85121844 is 44812158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85121849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121954 + ... + 122649.

It is an arithmetic number, because the mean of its divisors is an integer number (8561140).

Almost surely, 2^85121844 is an apocalyptic number.

It is an amenable number.

85121844 is an abundant number, since it is smaller than the sum of its proper divisors (120345516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85121844 is a wasteful number, since it uses less digits than its factorization.

85121844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244639 (or 244637 counting only the distinct ones).

The product of its digits is 10240, while the sum is 33.

The square root of 85121844 is about 9226.1500096194. The cubic root of 85121844 is about 439.8929560539.

The spelling of 85121844 in words is "eighty-five million, one hundred twenty-one thousand, eight hundred forty-four".