Subtracting 88889999 from its reverse (99998888), we obtain a square (11108889 = 33332).
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-88889999 is a prime.
It is a Duffinian number.
It is a plaindrome in base 10.
It is a zygodrome in base 10.
It is a congruent number.
Almost surely, 288889999 is an apocalyptic number.
88889999 is a wasteful number, since it uses less digits than its factorization.
88889999 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4342.
The square root of 88889999 is about 9428.1492881689. The cubic root of 88889999 is about 446.2904912428.
The spelling of 88889999 in words is "eighty-eight million, eight hundred eighty-nine thousand, nine hundred ninety-nine".