It is a self number, because there is not a number n which added to its sum of digits gives 1629980.
It is a congruent number.
21629980 is an apocalyptic number.
1629980 is a gapful number since it is divisible by the number (10) 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 1629980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1935360).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1629980 is a wasteful number, since it uses less digits than its factorization.
1629980 is an evil number, because the sum of its binary digits is even.
The square root of 1629980 is about 1276.7067008518. The cubic root of 1629980 is about 117.6867108498.
The spelling of 1629980 in words is "one million, six hundred twenty-nine thousand, nine hundred eighty".