85235638 has 16 divisors (see below), whose sum is σ = 131470416. Its totient is φ = 41420160.

The previous prime is 85235627. The next prime is 85235659. The reversal of 85235638 is 83653258.

It is a happy number.

It is a super-2 number, since 2×85235638² = 14530227970534088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85235638.

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, 21370 + ... + 25042.

It is an arithmetic number, because the mean of its divisors is an integer number (8216901).

Almost surely, 2^85235638 is an apocalyptic number.

85235638 is a deficient number, since it is larger than the sum of its proper divisors (46234778).

85235638 is a wasteful number, since it uses less digits than its factorization.

85235638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999.

The product of its digits is 172800, while the sum is 40.

The square root of 85235638 is about 9232.3148776458. The cubic root of 85235638 is about 440.0888904430.

It can be divided in two parts, 8523 and 5638, that added together give a square (14161 = 119²).

The spelling of 85235638 in words is "eighty-five million, two hundred thirty-five thousand, six hundred thirty-eight".