85538724 has 12 divisors (see below), whose sum is σ = 199590384. Its totient is φ = 28512904.

The previous prime is 85538681. The next prime is 85538737. The reversal of 85538724 is 42783558.

It is a tau number, because it is divible by the number of its divisors (12).

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, 3564102 + ... + 3564125.

It is an arithmetic number, because the mean of its divisors is an integer number (16632532).

Almost surely, 2^85538724 is an apocalyptic number.

It is an amenable number.

85538724 is an abundant number, since it is smaller than the sum of its proper divisors (114051660).

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

85538724 is a wasteful number, since it uses less digits than its factorization.

85538724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7128234 (or 7128232 counting only the distinct ones).

The product of its digits is 268800, while the sum is 42.

The square root of 85538724 is about 9248.7147215167. The cubic root of 85538724 is about 440.6099048800.

The spelling of 85538724 in words is "eighty-five million, five hundred thirty-eight thousand, seven hundred twenty-four".