85684558 has 16 divisors (see below), whose sum is σ = 134659584. Its totient is φ = 40839480.

The previous prime is 85684523. The next prime is 85684561. The reversal of 85684558 is 85548658.

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, 6160 + ... + 14467.

It is an arithmetic number, because the mean of its divisors is an integer number (8416224).

Almost surely, 2^85684558 is an apocalyptic number.

85684558 is a deficient number, since it is larger than the sum of its proper divisors (48975026).

85684558 is a wasteful number, since it uses less digits than its factorization.

85684558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20727.

The product of its digits is 1536000, while the sum is 49.

The square root of 85684558 is about 9256.5953784315. The cubic root of 85684558 is about 440.8601596575.

The spelling of 85684558 in words is "eighty-five million, six hundred eighty-four thousand, five hundred fifty-eight".