85745780 has 12 divisors (see below), whose sum is σ = 180066180. Its totient is φ = 34298304.

The previous prime is 85745747. The next prime is 85745797. The reversal of 85745780 is 8754758.

It can be written as a sum of positive squares in 2 ways, for example, as 46758244 + 38987536 = 6838^2 + 6244^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2143625 + ... + 2143664.

It is an arithmetic number, because the mean of its divisors is an integer number (15005515).

Almost surely, 2^85745780 is an apocalyptic number.

It is an amenable number.

85745780 is an abundant number, since it is smaller than the sum of its proper divisors (94320400).

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

85745780 is a wasteful number, since it uses less digits than its factorization.

85745780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287298 (or 4287296 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 44.

The square root of 85745780 is about 9259.9017273403. The cubic root of 85745780 is about 440.9651335121.

The spelling of 85745780 in words is "eighty-five million, seven hundred forty-five thousand, seven hundred eighty".