280206 has 16 divisors (see below), whose sum is σ = 622800. Its totient is φ = 93384.

The previous prime is 280199. The next prime is 280207. The reversal of 280206 is 602082.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 16.

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 280206.

It is not an unprimeable number, because it can be changed into a prime (280207) by changing a digit.

280206 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, 2541 + ... + 2648.

It is an arithmetic number, because the mean of its divisors is an integer number (38925).

2²⁸⁰²⁰⁶ is an apocalyptic number.

280206 is an abundant number, since it is smaller than the sum of its proper divisors (342594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

280206 is a wasteful number, since it uses less digits than its factorization.

280206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5200 (or 5194 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 280206 is about 529.3448781277. The cubic root of 280206 is about 65.4373660723.

Adding to 280206 its reverse (602082), we get a palindrome (882288).

It can be divided in two parts, 2 and 80206, that added together give a palindrome (80208).

The spelling of 280206 in words is "two hundred eighty thousand, two hundred six".