878819 has 4 divisors (see below), whose sum is σ = 907200. Its totient is φ = 850440.

The previous prime is 878797. The next prime is 878821. The reversal of 878819 is 918878.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 878819 - 2¹² = 874723 is a prime.

It is a super-2 number, since 2×878819² = 1544645669522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (878869) 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 3 ways as a sum of consecutive naturals, for example, 14144 + ... + 14205.

It is an arithmetic number, because the mean of its divisors is an integer number (226800).

2⁸⁷⁸⁸¹⁹ is an apocalyptic number.

878819 is a deficient number, since it is larger than the sum of its proper divisors (28381).

878819 is a wasteful number, since it uses less digits than its factorization.

878819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28380.

The product of its digits is 32256, while the sum is 41.

The square root of 878819 is about 937.4534655118. The cubic root of 878819 is about 95.7855092614.

The spelling of 878819 in words is "eight hundred seventy-eight thousand, eight hundred nineteen".