878839 has 8 divisors (see below), whose sum is σ = 961520. Its totient is φ = 798336.

The previous prime is 878837. The next prime is 878851. The reversal of 878839 is 938878.

It is a happy number.

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 878839 - 2¹ = 878837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 878795 and 878804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367 + ... + 1375.

It is an arithmetic number, because the mean of its divisors is an integer number (120190).

2⁸⁷⁸⁸³⁹ is an apocalyptic number.

878839 is a deficient number, since it is larger than the sum of its proper divisors (82681).

878839 is a wasteful number, since it uses less digits than its factorization.

878839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089.

The product of its digits is 96768, while the sum is 43.

The square root of 878839 is about 937.4641326472. The cubic root of 878839 is about 95.7862358789.

The spelling of 878839 in words is "eight hundred seventy-eight thousand, eight hundred thirty-nine".