85639910 has 16 divisors (see below), whose sum is σ = 155367936. Its totient is φ = 33985728.

The previous prime is 85639909. The next prime is 85639919. The reversal of 85639910 is 1993658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85639919) 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, 32447 + ... + 34986.

It is an arithmetic number, because the mean of its divisors is an integer number (9710496).

Almost surely, 2^85639910 is an apocalyptic number.

85639910 is a deficient number, since it is larger than the sum of its proper divisors (69728026).

85639910 is a wasteful number, since it uses less digits than its factorization.

85639910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67567.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 85639910 is about 9254.1833783430. The cubic root of 85639910 is about 440.7835727566.

The spelling of 85639910 in words is "eighty-five million, six hundred thirty-nine thousand, nine hundred ten".