85439142 has 24 divisors (see below), whose sum is σ = 190122816. Its totient is φ = 27709776.

The previous prime is 85439141. The next prime is 85439153. The reversal of 85439142 is 24193458.

85439142 is a `hidden beast` number, since 85 + 439 + 142 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 85439097 and 85439106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85439141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63478 + ... + 64809.

It is an arithmetic number, because the mean of its divisors is an integer number (7921784).

Almost surely, 2^85439142 is an apocalyptic number.

85439142 is an abundant number, since it is smaller than the sum of its proper divisors (104683674).

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

85439142 is a wasteful number, since it uses less digits than its factorization.

85439142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128332 (or 128329 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 85439142 is about 9243.3295949025. The cubic root of 85439142 is about 440.4388562162.

The spelling of 85439142 in words is "eighty-five million, four hundred thirty-nine thousand, one hundred forty-two".