280983 has 8 divisors (see below), whose sum is σ = 377200. Its totient is φ = 186048.

The previous prime is 280979. The next prime is 280997. The reversal of 280983 is 389082.

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

It is not a de Polignac number, because 280983 - 2² = 280979 is a prime.

It is a Duffinian number.

280983 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 280983.

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 280983.

It is not an unprimeable number, because it can be changed into a prime (280913) 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, 483 + ... + 891.

It is an arithmetic number, because the mean of its divisors is an integer number (47150).

2²⁸⁰⁹⁸³ is an apocalyptic number.

280983 is a deficient number, since it is larger than the sum of its proper divisors (96217).

280983 is a wasteful number, since it uses less digits than its factorization.

280983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 280983 is about 530.0782961035. The cubic root of 280983 is about 65.4977953146.

The spelling of 280983 in words is "two hundred eighty thousand, nine hundred eighty-three".