9888890 has 16 divisors (see below), whose sum is σ = 19418400. Its totient is φ = 3595920.

The previous prime is 9888889. The next prime is 9888929. The reversal of 9888890 is 988889.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44840 + ... + 45059.

It is an arithmetic number, because the mean of its divisors is an integer number (1213650).

Almost surely, 2^9888890 is an apocalyptic number.

9888890 is a deficient number, since it is larger than the sum of its proper divisors (9529510).

9888890 is a wasteful number, since it uses less digits than its factorization.

9888890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89917.

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

The square root of 9888890 is about 3144.6605540185. The cubic root of 9888890 is about 214.6425645603.

It can be divided in two parts, 98 and 88890, that added together give a palindrome (88988).

The spelling of 9888890 in words is "nine million, eight hundred eighty-eight thousand, eight hundred ninety".