278888 has 16 divisors (see below), whose sum is σ = 531360. Its totient is φ = 137200.

The previous prime is 278881. The next prime is 278891. The reversal of 278888 is 888872.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (278881) 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, 323 + ... + 813.

It is an arithmetic number, because the mean of its divisors is an integer number (33210).

2²⁷⁸⁸⁸⁸ is an apocalyptic number.

It is an amenable number.

278888 is a deficient number, since it is larger than the sum of its proper divisors (252472).

278888 is a wasteful number, since it uses less digits than its factorization.

278888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 564 counting only the distinct ones).

The product of its digits is 57344, while the sum is 41.

The square root of 278888 is about 528.0984756653. The cubic root of 278888 is about 65.3346059264.

The spelling of 278888 in words is "two hundred seventy-eight thousand, eight hundred eighty-eight".