878289 has 8 divisors (see below), whose sum is σ = 1196160. Its totient is φ = 572976.

The previous prime is 878287. The next prime is 878291. The reversal of 878289 is 982878.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (878287) and next prime (878291).

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

It is not a de Polignac number, because 878289 - 2¹ = 878287 is a prime.

878289 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 878289.

It is not an unprimeable number, because it can be changed into a prime (878287) 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, 2974 + ... + 3255.

It is an arithmetic number, because the mean of its divisors is an integer number (149520).

2⁸⁷⁸²⁸⁹ is an apocalyptic number.

It is an amenable number.

878289 is a deficient number, since it is larger than the sum of its proper divisors (317871).

878289 is a wasteful number, since it uses less digits than its factorization.

878289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6279.

The product of its digits is 64512, while the sum is 42.

The square root of 878289 is about 937.1707421810. The cubic root of 878289 is about 95.7662498809.

The spelling of 878289 in words is "eight hundred seventy-eight thousand, two hundred eighty-nine".