85224144 has 20 divisors (see below), whose sum is σ = 220162496. Its totient is φ = 28408032.

The previous prime is 85224091. The next prime is 85224149. The reversal of 85224144 is 44142258.

It is a super-4 number, since 4×85224144⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85224149) 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, 887704 + ... + 887799.

Almost surely, 2^85224144 is an apocalyptic number.

It is an amenable number.

85224144 is an abundant number, since it is smaller than the sum of its proper divisors (134938352).

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

85224144 is a wasteful number, since it uses less digits than its factorization.

85224144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775514 (or 1775508 counting only the distinct ones).

The product of its digits is 10240, while the sum is 30.

The square root of 85224144 is about 9231.6923692246. The cubic root of 85224144 is about 440.0691076025.

The spelling of 85224144 in words is "eighty-five million, two hundred twenty-four thousand, one hundred forty-four".