279980 has 12 divisors (see below), whose sum is σ = 588000. Its totient is φ = 111984.

The previous prime is 279977. The next prime is 279991. The reversal of 279980 is 89972.

279980 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 279980.

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 279980.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6980 + ... + 7019.

It is an arithmetic number, because the mean of its divisors is an integer number (49000).

2²⁷⁹⁹⁸⁰ is an apocalyptic number.

279980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

279980 is an abundant number, since it is smaller than the sum of its proper divisors (308020).

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

279980 is a wasteful number, since it uses less digits than its factorization.

279980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14008 (or 14006 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 279980 is about 529.1313636518. The cubic root of 279980 is about 65.4197685161.

The spelling of 279980 in words is "two hundred seventy-nine thousand, nine hundred eighty".