85439256 has 32 divisors (see below), whose sum is σ = 244112640. Its totient is φ = 24411168.

The previous prime is 85439251. The next prime is 85439281. The reversal of 85439256 is 65293458.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85439251) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 254116 + ... + 254451.

It is an arithmetic number, because the mean of its divisors is an integer number (7628520).

Almost surely, 2^85439256 is an apocalyptic number.

It is an amenable number.

85439256 is an abundant number, since it is smaller than the sum of its proper divisors (158673384).

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

85439256 is a wasteful number, since it uses less digits than its factorization.

85439256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508583 (or 508579 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 85439256 is about 9243.3357615095. The cubic root of 85439256 is about 440.4390521062.

The spelling of 85439256 in words is "eighty-five million, four hundred thirty-nine thousand, two hundred fifty-six".