78589 has 8 divisors (see below), whose sum is σ = 91520. Its totient is φ = 66096.

The previous prime is 78583. The next prime is 78593. The reversal of 78589 is 98587.

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

It is a cyclic number.

It is not a de Polignac number, because 78589 - 2¹¹ = 76541 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78583) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 667 + ... + 775.

It is an arithmetic number, because the mean of its divisors is an integer number (11440).

2⁷⁸⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

78589 is a deficient number, since it is larger than the sum of its proper divisors (12931).

78589 is a wasteful number, since it uses less digits than its factorization.

78589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219.

The product of its digits is 20160, while the sum is 37.

The square root of 78589 is about 280.3372968408. The cubic root of 78589 is about 42.8338640775.

The spelling of 78589 in words is "seventy-eight thousand, five hundred eighty-nine".