280323 has 6 divisors (see below), whose sum is σ = 404924. Its totient is φ = 186876.

The previous prime is 280321. The next prime is 280327. The reversal of 280323 is 323082.

It is not a de Polignac number, because 280323 - 2¹ = 280321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 280296 and 280305.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280323.

It is not an unprimeable number, because it can be changed into a prime (280321) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 15565 + ... + 15582.

2²⁸⁰³²³ is an apocalyptic number.

280323 is a deficient number, since it is larger than the sum of its proper divisors (124601).

280323 is a wasteful number, since it uses less digits than its factorization.

280323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31153 (or 31150 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 280323 is about 529.4553805563. The cubic root of 280323 is about 65.4464725944.

The spelling of 280323 in words is "two hundred eighty thousand, three hundred twenty-three".