278828 has 12 divisors (see below), whose sum is σ = 532392. Its totient is φ = 126720.

The previous prime is 278827. The next prime is 278843. The reversal of 278828 is 828872.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 278828.

It is not an unprimeable number, because it can be changed into a prime (278827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3125 + ... + 3212.

It is an arithmetic number, because the mean of its divisors is an integer number (44366).

2²⁷⁸⁸²⁸ is an apocalyptic number.

It is an amenable number.

278828 is a deficient number, since it is larger than the sum of its proper divisors (253564).

278828 is a wasteful number, since it uses less digits than its factorization.

278828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6352 (or 6350 counting only the distinct ones).

The product of its digits is 14336, while the sum is 35.

The square root of 278828 is about 528.0416650228. The cubic root of 278828 is about 65.3299202252.

The spelling of 278828 in words is "two hundred seventy-eight thousand, eight hundred twenty-eight".