280000003 has 4 divisors (see below), whose sum is σ = 280112400. Its totient is φ = 279887608.

The previous prime is 279999991. The next prime is 280000027. The reversal of 280000003 is 300000082.

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-280000003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280000033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52375 + ... + 57472.

It is an arithmetic number, because the mean of its divisors is an integer number (70028100).

Almost surely, 2^280000003 is an apocalyptic number.

280000003 is a deficient number, since it is larger than the sum of its proper divisors (112397).

280000003 is a wasteful number, since it uses less digits than its factorization.

280000003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112396.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 280000003 is about 16733.2006203237. The cubic root of 280000003 is about 654.2132643742.

Adding to 280000003 its reverse (300000082), we get a palindrome (580000085).

The spelling of 280000003 in words is "two hundred eighty million, three", and thus it is an aban number.