280326 has 16 divisors (see below), whose sum is σ = 590400. Its totient is φ = 88488.

The previous prime is 280321. The next prime is 280327. The reversal of 280326 is 623082.

It is a Curzon number.

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 280326.

It is not an unprimeable number, because it can be changed into a prime (280321) by changing a digit.

280326 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116 + ... + 1343.

It is an arithmetic number, because the mean of its divisors is an integer number (36900).

2²⁸⁰³²⁶ is an apocalyptic number.

280326 is an abundant number, since it is smaller than the sum of its proper divisors (310074).

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

280326 is a wasteful number, since it uses less digits than its factorization.

280326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 280326 is about 529.4582136486. The cubic root of 280326 is about 65.4467060617.

It can be divided in two parts, 280 and 326, that added together give a palindrome (606).

The spelling of 280326 in words is "two hundred eighty thousand, three hundred twenty-six".