85289720 has 32 divisors (see below), whose sum is σ = 195527520. Its totient is φ = 33471360.

The previous prime is 85289719. The next prime is 85289747. The reversal of 85289720 is 2798258.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17996 + ... + 22235.

It is an arithmetic number, because the mean of its divisors is an integer number (6110235).

Almost surely, 2^85289720 is an apocalyptic number.

It is an amenable number.

85289720 is an abundant number, since it is smaller than the sum of its proper divisors (110237800).

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

85289720 is a wasteful number, since it uses less digits than its factorization.

85289720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40295 (or 40291 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 85289720 is about 9235.2433644166. The cubic root of 85289720 is about 440.1819495429.

The spelling of 85289720 in words is "eighty-five million, two hundred eighty-nine thousand, seven hundred twenty".