878878439 has 4 divisors (see below), whose sum is σ = 880880880. Its totient is φ = 876876000.

The previous prime is 878878433. The next prime is 878878447. The reversal of 878878439 is 934878878.

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 878878439 - 2⁸ = 878878183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878878433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000562 + ... + 1001439.

It is an arithmetic number, because the mean of its divisors is an integer number (220220220).

Almost surely, 2^878878439 is an apocalyptic number.

878878439 is a deficient number, since it is larger than the sum of its proper divisors (2002441).

878878439 is a wasteful number, since it uses less digits than its factorization.

878878439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002440.

The product of its digits is 21676032, while the sum is 62.

The square root of 878878439 is about 29645.8840144800. The cubic root of 878878439 is about 957.8766869985.

The spelling of 878878439 in words is "eight hundred seventy-eight million, eight hundred seventy-eight thousand, four hundred thirty-nine".