9878915 has 8 divisors (see below), whose sum is σ = 11894688. Its totient is φ = 7876480.

The previous prime is 9878903. The next prime is 9878923. The reversal of 9878915 is 5198789.

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 9878915 - 2⁴ = 9878899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9878915.

It is an unprimeable number.

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, 1622 + ... + 4731.

It is an arithmetic number, because the mean of its divisors is an integer number (1486836).

Almost surely, 2^9878915 is an apocalyptic number.

9878915 is a deficient number, since it is larger than the sum of its proper divisors (2015773).

9878915 is a wasteful number, since it uses less digits than its factorization.

9878915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6669.

The product of its digits is 181440, while the sum is 47.

The square root of 9878915 is about 3143.0741321197. The cubic root of 9878915 is about 214.5703697408.

The spelling of 9878915 in words is "nine million, eight hundred seventy-eight thousand, nine hundred fifteen".