280238 has 16 divisors (see below), whose sum is σ = 494304. Its totient is φ = 116640.

The previous prime is 280229. The next prime is 280243. The reversal of 280238 is 832082.

280238 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

280238 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248 + ... + 788.

It is an arithmetic number, because the mean of its divisors is an integer number (30894).

2²⁸⁰²³⁸ is an apocalyptic number.

280238 is a deficient number, since it is larger than the sum of its proper divisors (214066).

280238 is a wasteful number, since it uses less digits than its factorization.

280238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 280238 is about 529.3751033058. The cubic root of 280238 is about 65.4398569968.

The spelling of 280238 in words is "two hundred eighty thousand, two hundred thirty-eight".