85891650 has 96 divisors (see below), whose sum is σ = 242984448. Its totient is φ = 19891200.

The previous prime is 85891627. The next prime is 85891661. The reversal of 85891650 is 5619858.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31855 + ... + 34445.

It is an arithmetic number, because the mean of its divisors is an integer number (2531088).

Almost surely, 2^85891650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85891650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121492224).

85891650 is an abundant number, since it is smaller than the sum of its proper divisors (157092798).

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

85891650 is a wasteful number, since it uses less digits than its factorization.

85891650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636 (or 2631 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 85891650 is about 9267.7748138375. The cubic root of 85891650 is about 441.2150472411.

The spelling of 85891650 in words is "eighty-five million, eight hundred ninety-one thousand, six hundred fifty".