It is a semiprime because it is the product of two primes.
It is a d-powerful number, because it can be written as 23 + 72 + 47 + 93 + 49 + 27 .
It is a self number, because there is not a number n which added to its sum of digits gives 279442.
279442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2279442 is an apocalyptic number.
279442 is a wasteful number, since it uses less digits than its factorization.
279442 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 139723.
The square root of 279442 is about 528.6227388223. The cubic root of 279442 is about 65.3778388505.
The spelling of 279442 in words is "two hundred seventy-nine thousand, four hundred forty-two".