9988880 has 40 divisors (see below), whose sum is σ = 25337664. Its totient is φ = 3632000.

The previous prime is 9988879. The next prime is 9988907. The reversal of 9988880 is 888899.

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4796 + ... + 6555.

Almost surely, 2^9988880 is an apocalyptic number.

It is an amenable number.

9988880 is an abundant number, since it is smaller than the sum of its proper divisors (15348784).

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

9988880 is a wasteful number, since it uses less digits than its factorization.

9988880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11375 (or 11369 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 50.

The square root of 9988880 is about 3160.5189447304. The cubic root of 9988880 is about 215.3635816718.

It can be divided in two parts, 9 and 988880, that added together give a palindrome (988889).

The spelling of 9988880 in words is "nine million, nine hundred eighty-eight thousand, eight hundred eighty".