280283873 has 8 divisors (see below), whose sum is σ = 283820040. Its totient is φ = 276756480.

The previous prime is 280283867. The next prime is 280283881. The reversal of 280283873 is 378382082.

It can be written as a sum of positive squares in 4 ways, for example, as 1827904 + 278455969 = 1352^2 + 16687^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 280283873 - 2²⁶ = 213175009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 280283873.

It is not an unprimeable number, because it can be changed into a prime (280283813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81713 + ... + 85073.

It is an arithmetic number, because the mean of its divisors is an integer number (35477505).

Almost surely, 2^280283873 is an apocalyptic number.

It is an amenable number.

280283873 is a deficient number, since it is larger than the sum of its proper divisors (3536167).

280283873 is an equidigital number, since it uses as much as digits as its factorization.

280283873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4387.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 280283873 is about 16741.6807101318. The cubic root of 280283873 is about 654.4342748424.

The spelling of 280283873 in words is "two hundred eighty million, two hundred eighty-three thousand, eight hundred seventy-three".