85389144 has 32 divisors (see below), whose sum is σ = 216483840. Its totient is φ = 28061600.

The previous prime is 85389131. The next prime is 85389151. The reversal of 85389144 is 44198358.

It is a junction number, because it is equal to n+sod(n) for n = 85389096 and 85389105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23352 + ... + 26759.

It is an arithmetic number, because the mean of its divisors is an integer number (6765120).

Almost surely, 2^85389144 is an apocalyptic number.

It is an amenable number.

85389144 is an abundant number, since it is smaller than the sum of its proper divisors (131094696).

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

85389144 is a wasteful number, since it uses less digits than its factorization.

85389144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50191 (or 50187 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 85389144 is about 9240.6246542103. The cubic root of 85389144 is about 440.3529262068.

The spelling of 85389144 in words is "eighty-five million, three hundred eighty-nine thousand, one hundred forty-four".