280049 has 8 divisors (see below), whose sum is σ = 349248. Its totient is φ = 218160.

The previous prime is 280037. The next prime is 280061. The reversal of 280049 is 940082.

It is an interprime number because it is at equal distance from previous prime (280037) and next prime (280061).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280049 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1742 + ... + 1895.

It is an arithmetic number, because the mean of its divisors is an integer number (43656).

2²⁸⁰⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

280049 is a deficient number, since it is larger than the sum of its proper divisors (69199).

280049 is a wasteful number, since it uses less digits than its factorization.

280049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3655.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 280049 is about 529.1965608354. The cubic root of 280049 is about 65.4251422252.

The spelling of 280049 in words is "two hundred eighty thousand, forty-nine".