85139850 has 48 divisors (see below), whose sum is σ = 213057792. Its totient is φ = 22498560.

The previous prime is 85139837. The next prime is 85139851. The reversal of 85139850 is 5893158.

It is a junction number, because it is equal to n+sod(n) for n = 85139799 and 85139808.

It is not an unprimeable number, because it can be changed into a prime (85139851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14439 + ... + 19461.

It is an arithmetic number, because the mean of its divisors is an integer number (4438704).

Almost surely, 2^85139850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85139850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106528896).

85139850 is an abundant number, since it is smaller than the sum of its proper divisors (127917942).

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

85139850 is a wasteful number, since it uses less digits than its factorization.

85139850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151 (or 5146 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 85139850 is about 9227.1257713331. The cubic root of 85139850 is about 439.9239710233.

The spelling of 85139850 in words is "eighty-five million, one hundred thirty-nine thousand, eight hundred fifty".