It is a Curzon number.
It is a self number, because there is not a number n which added to its sum of digits gives 402878.
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 402878.
It is an unprimeable number.
402878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2402878 is an apocalyptic number.
402878 is a wasteful number, since it uses less digits than its factorization.
402878 is an odious number, because the sum of its binary digits is odd.
The square root of 402878 is about 634.7267128458. The cubic root of 402878 is about 73.8569185585.
The spelling of 402878 in words is "four hundred two thousand, eight hundred seventy-eight".