9888998889 has 64 divisors (see below), whose sum is σ = 17470605312. Its totient is φ = 4816972800.

The previous prime is 9888998887. The next prime is 9888998921.

9888998889 is nontrivially palindromic in base 10.

9888998889 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9888998889 - 2¹ = 9888998887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9888998881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1083234 + ... + 1092324.

It is an arithmetic number, because the mean of its divisors is an integer number (272978208).

Almost surely, 2^9888998889 is an apocalyptic number.

It is an amenable number.

9888998889 is a deficient number, since it is larger than the sum of its proper divisors (7581606423).

9888998889 is a wasteful number, since it uses less digits than its factorization.

9888998889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9406.

The product of its digits is 1719926784, while the sum is 84.

The square root of 9888998889 is about 99443.4456814525. The cubic root of 9888998889 is about 2146.4335238481.

The spelling of 9888998889 in words is "nine billion, eight hundred eighty-eight million, nine hundred ninety-eight thousand, eight hundred eighty-nine".