278943 has 16 divisors (see below), whose sum is σ = 437760. Its totient is φ = 154656.

The previous prime is 278917. The next prime is 278947. The reversal of 278943 is 349872.

It is not a de Polignac number, because 278943 - 2⁵ = 278911 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598 + ... + 956.

It is an arithmetic number, because the mean of its divisors is an integer number (27360).

278943 is a Friedman number, since it can be written as 7^(3+2)-8+4^9, using all its digits and the basic arithmetic operations.

2²⁷⁸⁹⁴³ is an apocalyptic number.

278943 is a deficient number, since it is larger than the sum of its proper divisors (158817).

278943 is a wasteful number, since it uses less digits than its factorization.

278943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406.

The product of its digits is 12096, while the sum is 33.

The square root of 278943 is about 528.1505467194. The cubic root of 278943 is about 65.3389005622.

It can be divided in two parts, 278 and 943, that added together give a palindrome (1221).

The spelling of 278943 in words is "two hundred seventy-eight thousand, nine hundred forty-three".