It is a nialpdrome in base 16.
It is a zygodrome in base 16.
It is an unprimeable number.
278528 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
In principle, a polygon with 278528 sides can be constructed with ruler and compass.
278528 is a Friedman number, since it can be written as 8*8^5+(2+2)^7, using all its digits and the basic arithmetic operations.
2278528 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 278528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294903).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
278528 is an frugal number, since it uses more digits than its factorization.
278528 is an evil number, because the sum of its binary digits is even.
The square root of 278528 is about 527.7575200791. The cubic root of 278528 is about 65.3064816307.
The spelling of 278528 in words is "two hundred seventy-eight thousand, five hundred twenty-eight".