878589 has 12 divisors (see below), whose sum is σ = 1300572. Its totient is φ = 571200.

The previous prime is 878573. The next prime is 878593. The reversal of 878589 is 985878.

It can be written as a sum of positive squares in 2 ways, for example, as 13689 + 864900 = 117^2 + 930^2 .

It is not a de Polignac number, because 878589 - 2⁴ = 878573 is a prime.

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

878589 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878539) 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, 822 + ... + 1559.

It is an arithmetic number, because the mean of its divisors is an integer number (108381).

2⁸⁷⁸⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

878589 is a deficient number, since it is larger than the sum of its proper divisors (421983).

878589 is a wasteful number, since it uses less digits than its factorization.

878589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428 (or 2425 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 878589 is about 937.3307847286. The cubic root of 878589 is about 95.7771523683. Note that the first 3 decimals are identical.

The spelling of 878589 in words is "eight hundred seventy-eight thousand, five hundred eighty-nine".