It is a tau number, because it is divible by the number of its divisors (20).
It is a nialpdrome in base 16.
It is a zygodrome in base 2.
It is a self number, because there is not a number n which added to its sum of digits gives 1840.
1840 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
1840 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 1840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2232).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1840 is a wasteful number, since it uses less digits than its factorization.
1840 is an odious number, because the sum of its binary digits is odd.
The square root of 1840 is about 42.8952211791. The cubic root of 1840 is about 12.2538513505.
The spelling of 1840 in words is "one thousand, eight hundred forty".