85840785 has 12 divisors (see below), whose sum is σ = 148790772. Its totient is φ = 45781728.

The previous prime is 85840751. The next prime is 85840787. The reversal of 85840785 is 58704858.

It can be written as a sum of positive squares in 2 ways, for example, as 41525136 + 44315649 = 6444^2 + 6657^2 .

It is not a de Polignac number, because 85840785 - 2⁶ = 85840721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1907573 = 85840785 / (8 + 5 + 8 + 4 + 0 + 7 + 8 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85840785.

It is not an unprimeable number, because it can be changed into a prime (85840787) 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, 953742 + ... + 953831.

It is an arithmetic number, because the mean of its divisors is an integer number (12399231).

Almost surely, 2^85840785 is an apocalyptic number.

It is an amenable number.

85840785 is a deficient number, since it is larger than the sum of its proper divisors (62949987).

85840785 is a wasteful number, since it uses less digits than its factorization.

85840785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907584 (or 1907581 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The square root of 85840785 is about 9265.0302212135. The cubic root of 85840785 is about 441.1279342526.

The spelling of 85840785 in words is "eighty-five million, eight hundred forty thousand, seven hundred eighty-five".