It is a tau number, because it is divible by the number of its divisors (60).
It is a nialpdrome in base 16.
It is an unprimeable number.
2890640 is an apocalyptic number.
890640 is a gapful number since it is divisible by the number (80) 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 890640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1496742).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
890640 is a wasteful number, since it uses less digits than its factorization.
890640 is an odious number, because the sum of its binary digits is odd.
The square root of 890640 is about 943.7372515695. The cubic root of 890640 is about 96.2130684194.
The spelling of 890640 in words is "eight hundred ninety thousand, six hundred forty".