278268 has 12 divisors (see below), whose sum is σ = 649320. Its totient is φ = 92752.

The previous prime is 278261. The next prime is 278269. The reversal of 278268 is 862872.

278268 is nontrivially palindromic in base 11.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278261) 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, 11583 + ... + 11606.

It is an arithmetic number, because the mean of its divisors is an integer number (54110).

2²⁷⁸²⁶⁸ is an apocalyptic number.

It is an amenable number.

278268 is an abundant number, since it is smaller than the sum of its proper divisors (371052).

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

278268 is a wasteful number, since it uses less digits than its factorization.

278268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23196 (or 23194 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 278268 is about 527.5111373232. The cubic root of 278268 is about 65.2861545644.

It can be divided in two parts, 2782 and 68, that added together give a triangular number (2850 = T₇₅).

The spelling of 278268 in words is "two hundred seventy-eight thousand, two hundred sixty-eight".