278340 has 24 divisors (see below), whose sum is σ = 779520. Its totient is φ = 74208.

The previous prime is 278329. The next prime is 278347. The reversal of 278340 is 43872.

278340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 278340.

It is not an unprimeable number, because it can be changed into a prime (278347) by changing a digit.

278340 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 7 ways as a sum of consecutive naturals, for example, 2260 + ... + 2379.

It is an arithmetic number, because the mean of its divisors is an integer number (32480).

2²⁷⁸³⁴⁰ is an apocalyptic number.

278340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278340 is an abundant number, since it is smaller than the sum of its proper divisors (501180).

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

278340 is a wasteful number, since it uses less digits than its factorization.

278340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4651 (or 4649 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 278340 is about 527.5793779139. The cubic root of 278340 is about 65.2917848654.

The spelling of 278340 in words is "two hundred seventy-eight thousand, three hundred forty".