85891518 has 24 divisors (see below), whose sum is σ = 187336656. Its totient is φ = 28440000.

The previous prime is 85891517. The next prime is 85891523. The reversal of 85891518 is 81519858.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85891517) 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, 13083 + ... + 18518.

It is an arithmetic number, because the mean of its divisors is an integer number (7805694).

Almost surely, 2^85891518 is an apocalyptic number.

85891518 is an abundant number, since it is smaller than the sum of its proper divisors (101445138).

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

85891518 is a wasteful number, since it uses less digits than its factorization.

85891518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31760 (or 31757 counting only the distinct ones).

The product of its digits is 115200, while the sum is 45.

The square root of 85891518 is about 9267.7676923842. The cubic root of 85891518 is about 441.2148212183.

The spelling of 85891518 in words is "eighty-five million, eight hundred ninety-one thousand, five hundred eighteen".