278968 has 8 divisors (see below), whose sum is σ = 523080. Its totient is φ = 139480.

The previous prime is 278947. The next prime is 278981. The reversal of 278968 is 869872.

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 278968.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17428 + ... + 17443.

It is an arithmetic number, because the mean of its divisors is an integer number (65385).

278968 is a Friedman number, since it can be written as (8-2)^7-968, using all its digits and the basic arithmetic operations.

2²⁷⁸⁹⁶⁸ is an apocalyptic number.

It is an amenable number.

278968 is a deficient number, since it is larger than the sum of its proper divisors (244112).

278968 is a wasteful number, since it uses less digits than its factorization.

278968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34877 (or 34873 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 278968 is about 528.1742136833. The cubic root of 278968 is about 65.3408524827.

The spelling of 278968 in words is "two hundred seventy-eight thousand, nine hundred sixty-eight".