279880 has 16 divisors (see below), whose sum is σ = 629820. Its totient is φ = 111936.

The previous prime is 279863. The next prime is 279883. The reversal of 279880 is 88972.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 272484 + 7396 = 522^2 + 86^2 .

It is not an unprimeable number, because it can be changed into a prime (279883) by changing a digit.

279880 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3459 + ... + 3538.

2²⁷⁹⁸⁸⁰ is an apocalyptic number.

279880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

279880 is an abundant number, since it is smaller than the sum of its proper divisors (349940).

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

279880 is a wasteful number, since it uses less digits than its factorization.

279880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7008 (or 7004 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 279880 is about 529.0368607196. The cubic root of 279880 is about 65.4119789646.

The spelling of 279880 in words is "two hundred seventy-nine thousand, eight hundred eighty".