It is a nude number because it is divisible by every one of its digits.
21999872 is an apocalyptic number.
1999872 is a gapful number since it is divisible by the number (12) 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 1999872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3406208).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1999872 is a wasteful number, since it uses less digits than its factorization.
1999872 is an evil number, because the sum of its binary digits is even.
The square root of 1999872 is about 1414.1683068150. The cubic root of 1999872 is about 125.9894171006.
The spelling of 1999872 in words is "one million, nine hundred ninety-nine thousand, eight hundred seventy-two".