85188439 has 8 divisors (see below), whose sum is σ = 97764128. Its totient is φ = 72714240.

The previous prime is 85188379. The next prime is 85188449. The reversal of 85188439 is 93488158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85188439 - 2¹⁵ = 85155671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85188449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23562 + ... + 26935.

It is an arithmetic number, because the mean of its divisors is an integer number (12220516).

Almost surely, 2^85188439 is an apocalyptic number.

85188439 is a deficient number, since it is larger than the sum of its proper divisors (12575689).

85188439 is a wasteful number, since it uses less digits than its factorization.

85188439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50745.

The product of its digits is 276480, while the sum is 46.

The square root of 85188439 is about 9229.7583391983. The cubic root of 85188439 is about 440.0076427736.

It can be divided in two parts, 851884 and 39, that multiplied together give a triangular number (33223476 = T₈₁₅₁).

The spelling of 85188439 in words is "eighty-five million, one hundred eighty-eight thousand, four hundred thirty-nine".