280398 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a Curzon number.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280398.
It is an unprimeable number.
2280398 is an apocalyptic number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
280398 is a wasteful number, since it uses less digits than its factorization.
280398 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2771.
The square root of 280398 is about 529.5262033176. The cubic root of 280398 is about 65.4523087760.
The spelling of 280398 in words is "two hundred eighty thousand, three hundred ninety-eight".