9889599890 has 16 divisors (see below), whose sum is σ = 18848414232. Its totient is φ = 3723143424.

The previous prime is 9889599859. The next prime is 9889599919. The reversal of 9889599890 is 989959889.

It is a happy number.

9889599890 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9738334489 + 151265401 = 98683^2 + 12299^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29086889 + ... + 29087228.

Almost surely, 2^9889599890 is an apocalyptic number.

9889599890 is a deficient number, since it is larger than the sum of its proper divisors (8958814342).

9889599890 is a wasteful number, since it uses less digits than its factorization.

9889599890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58174141.

The product of its (nonzero) digits is 151165440, while the sum is 74.

The square root of 9889599890 is about 99446.4674586282. The cubic root of 9889599890 is about 2146.4770059227.

The spelling of 9889599890 in words is "nine billion, eight hundred eighty-nine million, five hundred ninety-nine thousand, eight hundred ninety".