85811776 has 28 divisors (see below), whose sum is σ = 171858940. Its totient is φ = 42508800.

The previous prime is 85811749. The next prime is 85811777. The reversal of 85811776 is 67711858.

It can be written as a sum of positive squares in 2 ways, for example, as 45158400 + 40653376 = 6720^2 + 6376^2 .

It is not an unprimeable number, because it can be changed into a prime (85811777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826 + ... + 13126.

Almost surely, 2^85811776 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 85811776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85929470).

85811776 is an abundant number, since it is smaller than the sum of its proper divisors (86047164).

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

85811776 is a wasteful number, since it uses less digits than its factorization.

85811776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12422 (or 12412 counting only the distinct ones).

The product of its digits is 94080, while the sum is 43.

The square root of 85811776 is about 9263.4645786552. The cubic root of 85811776 is about 441.0782371224.

The spelling of 85811776 in words is "eighty-five million, eight hundred eleven thousand, seven hundred seventy-six".