279040 has 40 divisors (see below), whose sum is σ = 675180. Its totient is φ = 110592.

The previous prime is 279029. The next prime is 279047. The reversal of 279040 is 40972.

It can be written as a sum of positive squares in 2 ways, for example, as 278784 + 256 = 528^2 + 16^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a d-powerful number, because it can be written as 2³ + 7⁵ + 0 + 9² + 4⁹ + 0 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (279047) by changing a digit.

279040 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2506 + ... + 2614.

2²⁷⁹⁰⁴⁰ is an apocalyptic number.

279040 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 279040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337590).

279040 is an abundant number, since it is smaller than the sum of its proper divisors (396140).

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

279040 is an equidigital number, since it uses as much as digits as its factorization.

279040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 279040 is about 528.2423686150. The cubic root of 279040 is about 65.3464733624.

The spelling of 279040 in words is "two hundred seventy-nine thousand, forty".