85885638 has 16 divisors (see below), whose sum is σ = 175426560. Its totient is φ = 28019336.

The previous prime is 85885637. The next prime is 85885669. The reversal of 85885638 is 83658858.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85885637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151998 + ... + 152561.

It is an arithmetic number, because the mean of its divisors is an integer number (10964160).

Almost surely, 2^85885638 is an apocalyptic number.

85885638 is an abundant number, since it is smaller than the sum of its proper divisors (89540922).

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

85885638 is a wasteful number, since it uses less digits than its factorization.

85885638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304611.

The product of its digits is 1843200, while the sum is 51.

The square root of 85885638 is about 9267.4504584594. The cubic root of 85885638 is about 441.2047526946.

The spelling of 85885638 in words is "eighty-five million, eight hundred eighty-five thousand, six hundred thirty-eight".