Multipling 278258 by its sum of digits (32), we get a square (8904256 = 29842).
278258 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is an ABA number since it can be written as A⋅BA, here for A=2, B=373.
It is an Ulam number.
It is a Duffinian number.
It is a nialpdrome in base 13.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 278258.
It is an unprimeable number.
2278258 is an apocalyptic number.
278258 is an frugal number, since it uses more digits than its factorization.
278258 is an odious number, because the sum of its binary digits is odd.
The square root of 278258 is about 527.5016587652. The cubic root of 278258 is about 65.2853725013.
The spelling of 278258 in words is "two hundred seventy-eight thousand, two hundred fifty-eight".