9889918 has 16 divisors (see below), whose sum is σ = 15696720. Its totient is φ = 4660416.

The previous prime is 9889909. The next prime is 9889921. The reversal of 9889918 is 8199889.

It is a congruent number.

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, 8296 + ... + 9412.

It is an arithmetic number, because the mean of its divisors is an integer number (981045).

Almost surely, 2^9889918 is an apocalyptic number.

9889918 is a deficient number, since it is larger than the sum of its proper divisors (5806802).

9889918 is a wasteful number, since it uses less digits than its factorization.

9889918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371.

The product of its digits is 373248, while the sum is 52.

The square root of 9889918 is about 3144.8240014347. The cubic root of 9889918 is about 214.6500020284.

The spelling of 9889918 in words is "nine million, eight hundred eighty-nine thousand, nine hundred eighteen".