85684580 has 12 divisors (see below), whose sum is σ = 179937660. Its totient is φ = 34273824.

The previous prime is 85684561. The next prime is 85684597. The reversal of 85684580 is 8548658.

It can be written as a sum of positive squares in 2 ways, for example, as 24344356 + 61340224 = 4934^2 + 7832^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2142095 + ... + 2142134.

It is an arithmetic number, because the mean of its divisors is an integer number (14994805).

Almost surely, 2^85684580 is an apocalyptic number.

It is an amenable number.

85684580 is an abundant number, since it is smaller than the sum of its proper divisors (94253080).

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

85684580 is a wasteful number, since it uses less digits than its factorization.

85684580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4284238 (or 4284236 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 44.

The square root of 85684580 is about 9256.5965667733. The cubic root of 85684580 is about 440.8601973886.

The spelling of 85684580 in words is "eighty-five million, six hundred eighty-four thousand, five hundred eighty".