278323 has 4 divisors (see below), whose sum is σ = 290448. Its totient is φ = 266200.

The previous prime is 278321. The next prime is 278329. The reversal of 278323 is 323872.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 278323 - 2¹ = 278321 is a prime.

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

It is a Duffinian number.

It is a nialpdrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (278321) 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 3 ways as a sum of consecutive naturals, for example, 6028 + ... + 6073.

It is an arithmetic number, because the mean of its divisors is an integer number (72612).

2²⁷⁸³²³ is an apocalyptic number.

278323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

278323 is a deficient number, since it is larger than the sum of its proper divisors (12125).

278323 is a wasteful number, since it uses less digits than its factorization.

278323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12124.

The product of its digits is 2016, while the sum is 25.

The square root of 278323 is about 527.5632663482. The cubic root of 278323 is about 65.2904555763.

It can be divided in two parts, 2783 and 23, that multiplied together give a square (64009 = 253²).

The spelling of 278323 in words is "two hundred seventy-eight thousand, three hundred twenty-three".