280343 has 8 divisors (see below), whose sum is σ = 331680. Its totient is φ = 231840.

The previous prime is 280339. The next prime is 280351. The reversal of 280343 is 343082.

280343 is nontrivially palindromic in base 14.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 280343 - 2² = 280339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280343.

It is not an unprimeable number, because it can be changed into a prime (280303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488 + ... + 893.

It is an arithmetic number, because the mean of its divisors is an integer number (41460).

2²⁸⁰³⁴³ is an apocalyptic number.

280343 is a deficient number, since it is larger than the sum of its proper divisors (51337).

280343 is a wasteful number, since it uses less digits than its factorization.

280343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 280343 is about 529.4742675523. The cubic root of 280343 is about 65.4480290113.

The spelling of 280343 in words is "two hundred eighty thousand, three hundred forty-three".