279280 has 20 divisors (see below), whose sum is σ = 649512. Its totient is φ = 111680.

The previous prime is 279269. The next prime is 279311. The reversal of 279280 is 82972.

279280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a d-powerful number, because it can be written as 2⁸ + 7⁵ + 2¹⁸ + 9 + 8² + 0 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1666 + ... + 1825.

2²⁷⁹²⁸⁰ is an apocalyptic number.

279280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

279280 is an abundant number, since it is smaller than the sum of its proper divisors (370232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

279280 is a wasteful number, since it uses less digits than its factorization.

279280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504 (or 3498 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 279280 is about 528.4694882394. The cubic root of 279280 is about 65.3652026479.

The spelling of 279280 in words is "two hundred seventy-nine thousand, two hundred eighty".