278255 has 16 divisors (see below), whose sum is σ = 367200. Its totient is φ = 201600.

The previous prime is 278237. The next prime is 278261. The reversal of 278255 is 552872.

It is not a de Polignac number, because 278255 - 2⁶ = 278191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a d-powerful number, because it can be written as 2² + 7⁶ + 2⁸ + 8⁴ + 5⁷ + 5⁷ .

It is a nialpdrome in base 13.

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 278255.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2705 + ... + 2805.

It is an arithmetic number, because the mean of its divisors is an integer number (22950).

2²⁷⁸²⁵⁵ is an apocalyptic number.

278255 is a deficient number, since it is larger than the sum of its proper divisors (88945).

278255 is a wasteful number, since it uses less digits than its factorization.

278255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154.

The product of its digits is 5600, while the sum is 29.

The square root of 278255 is about 527.4988151645. The cubic root of 278255 is about 65.2851378788.

The spelling of 278255 in words is "two hundred seventy-eight thousand, two hundred fifty-five".