878664438 has 12 divisors (see below), whose sum is σ = 1903772988. Its totient is φ = 292888140.

The previous prime is 878664407. The next prime is 878664487. The reversal of 878664438 is 834466878.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24407328 + ... + 24407363.

It is an arithmetic number, because the mean of its divisors is an integer number (158647749).

Almost surely, 2^878664438 is an apocalyptic number.

878664438 is an abundant number, since it is smaller than the sum of its proper divisors (1025108550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

878664438 is a wasteful number, since it uses less digits than its factorization.

878664438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48814699 (or 48814696 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The square root of 878664438 is about 29642.2745078714. The cubic root of 878664438 is about 957.7989351731.

The spelling of 878664438 in words is "eight hundred seventy-eight million, six hundred sixty-four thousand, four hundred thirty-eight".