278580 has 24 divisors (see below), whose sum is σ = 780192. Its totient is φ = 74272.

The previous prime is 278563. The next prime is 278581. The reversal of 278580 is 85872.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2262 + ... + 2381.

It is an arithmetic number, because the mean of its divisors is an integer number (32508).

2²⁷⁸⁵⁸⁰ is an apocalyptic number.

278580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278580 is an abundant number, since it is smaller than the sum of its proper divisors (501612).

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

278580 is a wasteful number, since it uses less digits than its factorization.

278580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655 (or 4653 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 278580 is about 527.8067828287. The cubic root of 278580 is about 65.3105455258.

It can be divided in two parts, 278 and 580, that added together give a palindrome (858).

The spelling of 278580 in words is "two hundred seventy-eight thousand, five hundred eighty".