85780589 has 8 divisors (see below), whose sum is σ = 91154808. Its totient is φ = 80442880.

The previous prime is 85780549. The next prime is 85780601. The reversal of 85780589 is 98508758.

It can be written as a sum of positive squares in 4 ways, for example, as 61936900 + 23843689 = 7870^2 + 4883^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85780589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85780549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4202 + ... + 13755.

It is an arithmetic number, because the mean of its divisors is an integer number (11394351).

Almost surely, 2^85780589 is an apocalyptic number.

It is an amenable number.

85780589 is a deficient number, since it is larger than the sum of its proper divisors (5374219).

85780589 is a wasteful number, since it uses less digits than its factorization.

85780589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18255.

The product of its (nonzero) digits is 806400, while the sum is 50.

The square root of 85780589 is about 9261.7810922090. The cubic root of 85780589 is about 441.0247962295.

The spelling of 85780589 in words is "eighty-five million, seven hundred eighty thousand, five hundred eighty-nine".