280893 has 8 divisors (see below), whose sum is σ = 378400. Its totient is φ = 185328.

The previous prime is 280883. The next prime is 280897. The reversal of 280893 is 398082.

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

It is not a de Polignac number, because 280893 - 2¹⁸ = 18749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 280893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280897) 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, 103 + ... + 756.

It is an arithmetic number, because the mean of its divisors is an integer number (47300).

2²⁸⁰⁸⁹³ is an apocalyptic number.

It is an amenable number.

280893 is a deficient number, since it is larger than the sum of its proper divisors (97507).

280893 is a wasteful number, since it uses less digits than its factorization.

280893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

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

The square root of 280893 is about 529.9933961853. The cubic root of 280893 is about 65.4908014975.

The spelling of 280893 in words is "two hundred eighty thousand, eight hundred ninety-three".