It is a semiprime because it is the product of two primes.
It is a Curzon number.
It is a nialpdrome in base 10.
It is a congruent number.
It is an unprimeable number.
Almost surely, 299988886 is an apocalyptic number.
99988886 is a wasteful number, since it uses less digits than its factorization.
99988886 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 49994445.
The square root of 99988886 is about 9999.4442845590. Note that the first 3 decimals coincide. The cubic root of 99988886 is about 464.1416871848.
The spelling of 99988886 in words is "ninety-nine million, nine hundred eighty-eight thousand, eight hundred eighty-six".