85510920 has 64 divisors (see below), whose sum is σ = 279858240. Its totient is φ = 20729600.

The previous prime is 85510913. The next prime is 85510921. The reversal of 85510920 is 2901558.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (85510921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31071 + ... + 33710.

It is an arithmetic number, because the mean of its divisors is an integer number (4372785).

Almost surely, 2^85510920 is an apocalyptic number.

It is an amenable number.

85510920 is an abundant number, since it is smaller than the sum of its proper divisors (194347320).

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

85510920 is a wasteful number, since it uses less digits than its factorization.

85510920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64806 (or 64802 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 85510920 is about 9247.2114715735. The cubic root of 85510920 is about 440.5621602453.

The spelling of 85510920 in words is "eighty-five million, five hundred ten thousand, nine hundred twenty".