278343 has 24 divisors (see below), whose sum is σ = 453840. Its totient is φ = 168480.

The previous prime is 278329. The next prime is 278347. The reversal of 278343 is 343872.

278343 = 7³ + 8³ + ... + 32³.

It is not a de Polignac number, because 278343 - 2⁶ = 278279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

Its product of digits (4032) is a multiple of the sum of its prime factors (96).

It is a nialpdrome in base 13.

It is a zygodrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4533 + ... + 4593.

It is an arithmetic number, because the mean of its divisors is an integer number (18910).

2²⁷⁸³⁴³ is an apocalyptic number.

278343 is a deficient number, since it is larger than the sum of its proper divisors (175497).

278343 is a wasteful number, since it uses less digits than its factorization.

278343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 77 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 278343 is about 527.5822210803. The cubic root of 278343 is about 65.2920194402.

The spelling of 278343 in words is "two hundred seventy-eight thousand, three hundred forty-three".