278808 has 16 divisors (see below), whose sum is σ = 697080. Its totient is φ = 92928.

The previous prime is 278807. The next prime is 278809. The reversal of 278808 is 808872.

It is an interprime number because it is at equal distance from previous prime (278807) and next prime (278809).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 278808.

It is not an unprimeable number, because it can be changed into a prime (278801) 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 3 ways as a sum of consecutive naturals, for example, 5785 + ... + 5832.

2²⁷⁸⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

278808 is an abundant number, since it is smaller than the sum of its proper divisors (418272).

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

278808 is a wasteful number, since it uses less digits than its factorization.

278808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11626 (or 11622 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 278808 is about 528.0227267836. The cubic root of 278808 is about 65.3283581755.

The spelling of 278808 in words is "two hundred seventy-eight thousand, eight hundred eight".