85784223 has 32 divisors (see below), whose sum is σ = 135688192. Its totient is φ = 47174400.

The previous prime is 85784201. The next prime is 85784243. The reversal of 85784223 is 32248758.

It is not a de Polignac number, because 85784223 - 2¹⁰ = 85783199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85784243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203553 + ... + 203973.

It is an arithmetic number, because the mean of its divisors is an integer number (4240256).

Almost surely, 2^85784223 is an apocalyptic number.

85784223 is a deficient number, since it is larger than the sum of its proper divisors (49903969).

85784223 is a wasteful number, since it uses less digits than its factorization.

85784223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775.

The product of its digits is 107520, while the sum is 39.

The square root of 85784223 is about 9261.9772726994. The cubic root of 85784223 is about 441.0310239845.

The spelling of 85784223 in words is "eighty-five million, seven hundred eighty-four thousand, two hundred twenty-three".