85785808 has 20 divisors (see below), whose sum is σ = 175987620. Its totient is φ = 40369664.

The previous prime is 85785803. The next prime is 85785811. The reversal of 85785808 is 80858758.

It can be written as a sum of positive squares in 2 ways, for example, as 36336784 + 49449024 = 6028^2 + 7032^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85785803) 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, 157423 + ... + 157966.

It is an arithmetic number, because the mean of its divisors is an integer number (8799381).

Almost surely, 2^85785808 is an apocalyptic number.

It is an amenable number.

85785808 is an abundant number, since it is smaller than the sum of its proper divisors (90201812).

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

85785808 is a wasteful number, since it uses less digits than its factorization.

85785808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315414 (or 315408 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 49.

The square root of 85785808 is about 9262.0628371870. The cubic root of 85785808 is about 441.0337402177.

The spelling of 85785808 in words is "eighty-five million, seven hundred eighty-five thousand, eight hundred eight".