280802 has 4 divisors (see below), whose sum is σ = 421206. Its totient is φ = 140400.

The previous prime is 280771. The next prime is 280811. The reversal of 280802 is 208082.

280802 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 279841 + 961 = 529^2 + 31^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280802.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 70199 + ... + 70202.

2²⁸⁰⁸⁰² is an apocalyptic number.

280802 is a deficient number, since it is larger than the sum of its proper divisors (140404).

280802 is a wasteful number, since it uses less digits than its factorization.

280802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140403.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 280802 is about 529.9075391047. The cubic root of 280802 is about 65.4837284524.

Adding to 280802 its reverse (208082), we get a palindrome (488884).

It can be divided in two parts, 28080 and 2, that added together give a palindrome (28082).

The spelling of 280802 in words is "two hundred eighty thousand, eight hundred two".