9878978592 has 144 divisors (see below), whose sum is σ = 33518106720. Its totient is φ = 2822553216.

The previous prime is 9878978587. The next prime is 9878978611. The reversal of 9878978592 is 2958798789.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 9878978592.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 74338 + ... + 159009.

It is an arithmetic number, because the mean of its divisors is an integer number (232764630).

Almost surely, 2^9878978592 is an apocalyptic number.

It is an amenable number.

9878978592 is an abundant number, since it is smaller than the sum of its proper divisors (23639128128).

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

9878978592 is a wasteful number, since it uses less digits than its factorization.

9878978592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233380 (or 233359 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 72.

The square root of 9878978592 is about 99393.0510247070. The cubic root of 9878978592 is about 2145.7083014664.

The spelling of 9878978592 in words is "nine billion, eight hundred seventy-eight million, nine hundred seventy-eight thousand, five hundred ninety-two".