258340 is nontrivially palindromic in base 9.
258340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a congruent number.
It is an unprimeable number.
2258340 is an apocalyptic number.
258340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
258340 is a wasteful number, since it uses less digits than its factorization.
258340 is an odious number, because the sum of its binary digits is odd.
The square root of 258340 is about 508.2715809486. The cubic root of 258340 is about 63.6889200950.
The spelling of 258340 in words is "two hundred fifty-eight thousand, three hundred forty".