85724235 has 48 divisors (see below), whose sum is σ = 154103040. Its totient is φ = 44052480.

The previous prime is 85724201. The next prime is 85724237. The reversal of 85724235 is 53242758.

It is not a de Polignac number, because 85724235 - 2¹² = 85720139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85724235.

It is not an unprimeable number, because it can be changed into a prime (85724237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 178726 + ... + 179204.

It is an arithmetic number, because the mean of its divisors is an integer number (3210480).

Almost surely, 2^85724235 is an apocalyptic number.

85724235 is a deficient number, since it is larger than the sum of its proper divisors (68378805).

85724235 is a wasteful number, since it uses less digits than its factorization.

85724235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 625 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 85724235 is about 9258.7383049744. The cubic root of 85724235 is about 440.9281972351.

The spelling of 85724235 in words is "eighty-five million, seven hundred twenty-four thousand, two hundred thirty-five".