280303028 has 12 divisors (see below), whose sum is σ = 490651140. Its totient is φ = 140116992.

The previous prime is 280303027. The next prime is 280303057. The reversal of 280303028 is 820303082.

It can be written as a sum of positive squares in 2 ways, for example, as 23406244 + 256896784 = 4838^2 + 16028^2 .

It is a junction number, because it is equal to n+sod(n) for n = 280302988 and 280303006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280303027) 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 3 ways as a sum of consecutive naturals, for example, 20750 + ... + 31482.

It is an arithmetic number, because the mean of its divisors is an integer number (40887595).

Almost surely, 2^280303028 is an apocalyptic number.

It is an amenable number.

280303028 is a deficient number, since it is larger than the sum of its proper divisors (210348112).

280303028 is a wasteful number, since it uses less digits than its factorization.

280303028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17266 (or 17264 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 280303028 is about 16742.2527755377. The cubic root of 280303028 is about 654.4491828269.

The spelling of 280303028 in words is "two hundred eighty million, three hundred three thousand, twenty-eight".