878115865 has 8 divisors (see below), whose sum is σ = 1149533568. Its totient is φ = 638629680.

The previous prime is 878115863. The next prime is 878115871. The reversal of 878115865 is 568511878.

It is a happy number.

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

It is not a de Polignac number, because 878115865 - 2¹ = 878115863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878115863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7982817 + ... + 7982926.

It is an arithmetic number, because the mean of its divisors is an integer number (143691696).

Almost surely, 2^878115865 is an apocalyptic number.

It is an amenable number.

878115865 is a deficient number, since it is larger than the sum of its proper divisors (271417703).

878115865 is a wasteful number, since it uses less digits than its factorization.

878115865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15965759.

The product of its digits is 537600, while the sum is 49.

The square root of 878115865 is about 29633.0198427362. The cubic root of 878115865 is about 957.5995674375.

The spelling of 878115865 in words is "eight hundred seventy-eight million, one hundred fifteen thousand, eight hundred sixty-five".