85915816 has 48 divisors (see below), whose sum is σ = 190517940. Its totient is φ = 36207360.

The previous prime is 85915799. The next prime is 85915831. The reversal of 85915816 is 61851958.

It can be written as a sum of positive squares in 2 ways, for example, as 73170916 + 12744900 = 8554^2 + 3570^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22116 + ... + 25708.

Almost surely, 2^85915816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85915816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95258970).

85915816 is an abundant number, since it is smaller than the sum of its proper divisors (104602124).

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

85915816 is a wasteful number, since it uses less digits than its factorization.

85915816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674 (or 3663 counting only the distinct ones).

The product of its digits is 86400, while the sum is 43.

The square root of 85915816 is about 9269.0784870989. The cubic root of 85915816 is about 441.2564226368.

The spelling of 85915816 in words is "eighty-five million, nine hundred fifteen thousand, eight hundred sixteen".