279240 has 64 divisors (see below), whose sum is σ = 907200. Its totient is φ = 68352.

The previous prime is 279221. The next prime is 279269. The reversal of 279240 is 42972.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 279240.

It is an unprimeable number.

279240 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 15 ways as a sum of consecutive naturals, for example, 1471 + ... + 1649.

It is an arithmetic number, because the mean of its divisors is an integer number (14175).

2²⁷⁹²⁴⁰ is an apocalyptic number.

279240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 279240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453600).

279240 is an abundant number, since it is smaller than the sum of its proper divisors (627960).

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

279240 is a wasteful number, since it uses less digits than its factorization.

279240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 279240 is about 528.4316417475. The cubic root of 279240 is about 65.3620818456.

The spelling of 279240 in words is "two hundred seventy-nine thousand, two hundred forty".