280935 has 16 divisors (see below), whose sum is σ = 499680. Its totient is φ = 149760.

The previous prime is 280933. The next prime is 280939. The reversal of 280935 is 539082.

It is not a de Polignac number, because 280935 - 2¹ = 280933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 280899 and 280908.

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 280935.

It is not an unprimeable number, because it can be changed into a prime (280933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 906 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (31230).

2²⁸⁰⁹³⁵ is an apocalyptic number.

280935 is a deficient number, since it is larger than the sum of its proper divisors (218745).

280935 is a wasteful number, since it uses less digits than its factorization.

280935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095 (or 2089 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 280935 is about 530.0330178395. The cubic root of 280935 is about 65.4940654647.

The spelling of 280935 in words is "two hundred eighty thousand, nine hundred thirty-five".