9887878 has 48 divisors (see below), whose sum is σ = 20109600. Its totient is φ = 3548160.

The previous prime is 9887851. The next prime is 9887881. The reversal of 9887878 is 8787889.

9887878 is a modest number, since divided by 7878 gives 988 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21798 + ... + 22246.

It is an arithmetic number, because the mean of its divisors is an integer number (418950).

Almost surely, 2^9887878 is an apocalyptic number.

9887878 is an abundant number, since it is smaller than the sum of its proper divisors (10221722).

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

9887878 is a wasteful number, since it uses less digits than its factorization.

9887878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493 (or 482 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 55.

The square root of 9887878 is about 3144.4996422324. The cubic root of 9887878 is about 214.6352423470.

The spelling of 9887878 in words is "nine million, eight hundred eighty-seven thousand, eight hundred seventy-eight".