It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 998951616 = 3063 + 9903 = 4323 + 9723.
It is a congruent number.
It is an unprimeable number.
Almost surely, 2998951616 is an apocalyptic number.
998951616 is a gapful number since it is divisible by the number (96) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 998951616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1627303832).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
998951616 is an frugal number, since it uses more digits than its factorization.
998951616 is an evil number, because the sum of its binary digits is even.
The square root of 998951616 is about 31606.1958482827. The cubic root of 998951616 is about 999.6504164723.
The spelling of 998951616 in words is "nine hundred ninety-eight million, nine hundred fifty-one thousand, six hundred sixteen".