85220064 has 36 divisors (see below), whose sum is σ = 242345376. Its totient is φ = 28406592.

The previous prime is 85220039. The next prime is 85220087. The reversal of 85220064 is 46002258.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 147664 + ... + 148239.

It is an arithmetic number, because the mean of its divisors is an integer number (6731816).

Almost surely, 2^85220064 is an apocalyptic number.

It is an amenable number.

85220064 is an abundant number, since it is smaller than the sum of its proper divisors (157125312).

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

85220064 is a wasteful number, since it uses less digits than its factorization.

85220064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295919 (or 295908 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 85220064 is about 9231.4713886791. The cubic root of 85220064 is about 440.0620849032.

The spelling of 85220064 in words is "eighty-five million, two hundred twenty thousand, sixty-four".