85249644 has 24 divisors (see below), whose sum is σ = 199951920. Its totient is φ = 28268544.

The previous prime is 85249643. The next prime is 85249657. The reversal of 85249644 is 44694258.

It is a junction number, because it is equal to n+sod(n) for n = 85249596 and 85249605.

It is not an unprimeable number, because it can be changed into a prime (85249643) 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, 16089 + ... + 20720.

It is an arithmetic number, because the mean of its divisors is an integer number (8331330).

Almost surely, 2^85249644 is an apocalyptic number.

It is an amenable number.

85249644 is an abundant number, since it is smaller than the sum of its proper divisors (114702276).

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

85249644 is a wasteful number, since it uses less digits than its factorization.

85249644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37009 (or 37007 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 85249644 is about 9233.0733778087. The cubic root of 85249644 is about 440.1129943959.

The spelling of 85249644 in words is "eighty-five million, two hundred forty-nine thousand, six hundred forty-four".