280799 has 4 divisors (see below), whose sum is σ = 282264. Its totient is φ = 279336.

The previous prime is 280771. The next prime is 280811. The reversal of 280799 is 997082.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280799 is a prime.

It is an Ulam number.

It is a Duffinian number.

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 280799.

It is not an unprimeable number, because it can be changed into a prime (280729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392 + ... + 845.

It is an arithmetic number, because the mean of its divisors is an integer number (70566).

2²⁸⁰⁷⁹⁹ is an apocalyptic number.

280799 is a deficient number, since it is larger than the sum of its proper divisors (1465).

280799 is a wasteful number, since it uses less digits than its factorization.

280799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 280799 is about 529.9047084146. The cubic root of 280799 is about 65.4834952490.

The spelling of 280799 in words is "two hundred eighty thousand, seven hundred ninety-nine".