85439284 has 24 divisors (see below), whose sum is σ = 173683328. Its totient is φ = 36015840.

The previous prime is 85439281. The next prime is 85439303. The reversal of 85439284 is 48293458.

It is a self number, because there is not a number n which added to its sum of digits gives 85439284.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85439281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23304 + ... + 26719.

Almost surely, 2^85439284 is an apocalyptic number.

It is an amenable number.

85439284 is an abundant number, since it is smaller than the sum of its proper divisors (88244044).

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

85439284 is a wasteful number, since it uses less digits than its factorization.

85439284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50095 (or 50093 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 85439284 is about 9243.3372761141. The cubic root of 85439284 is about 440.4391002194.

The spelling of 85439284 in words is "eighty-five million, four hundred thirty-nine thousand, two hundred eighty-four".