It is a congruent number.
22167998 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 2167998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2540160).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2167998 is a wasteful number, since it uses less digits than its factorization.
2167998 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1312.
The square root of 2167998 is about 1472.4123063870. The cubic root of 2167998 is about 129.4254327405.
The spelling of 2167998 in words is "two million, one hundred sixty-seven thousand, nine hundred ninety-eight".