280748 has 12 divisors (see below), whose sum is σ = 529200. Its totient is φ = 129552.

The previous prime is 280729. The next prime is 280751. The reversal of 280748 is 847082.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 280748.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280748.

It is an unprimeable number.

280748 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 3 ways as a sum of consecutive naturals, for example, 2648 + ... + 2751.

It is an arithmetic number, because the mean of its divisors is an integer number (44100).

2²⁸⁰⁷⁴⁸ is an apocalyptic number.

It is an amenable number.

280748 is a deficient number, since it is larger than the sum of its proper divisors (248452).

280748 is a wasteful number, since it uses less digits than its factorization.

280748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5416 (or 5414 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 280748 is about 529.8565843698. The cubic root of 280748 is about 65.4795305383.

It can be divided in two parts, 28074 and 8, that added together give a palindrome (28082).

The spelling of 280748 in words is "two hundred eighty thousand, seven hundred forty-eight".