9889880 has 192 divisors, whose sum is σ = 31622400. Its totient is φ = 2695680.

The previous prime is 9889877. The next prime is 9889889. The reversal of 9889880 is 889889.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9889889) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 520511 + ... + 520529.

It is an arithmetic number, because the mean of its divisors is an integer number (164700).

Almost surely, 2^9889880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9889880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15811200).

9889880 is an abundant number, since it is smaller than the sum of its proper divisors (21732520).

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

9889880 is a wasteful number, since it uses less digits than its factorization.

9889880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74 (or 57 counting only the distinct ones).

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

The square root of 9889880 is about 3144.8179597554. The cubic root of 9889880 is about 214.6497271117.

The spelling of 9889880 in words is "nine million, eight hundred eighty-nine thousand, eight hundred eighty".