280716028 has 12 divisors (see below), whose sum is σ = 494093880. Its totient is φ = 139546352.

The previous prime is 280716017. The next prime is 280716047. The reversal of 280716028 is 820617082.

It is a junction number, because it is equal to n+sod(n) for n = 280715984 and 280716002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202138 + ... + 203521.

It is an arithmetic number, because the mean of its divisors is an integer number (41174490).

Almost surely, 2^280716028 is an apocalyptic number.

It is an amenable number.

280716028 is a deficient number, since it is larger than the sum of its proper divisors (213377852).

280716028 is a wasteful number, since it uses less digits than its factorization.

280716028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405836 (or 405834 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 280716028 is about 16754.5822985833. The cubic root of 280716028 is about 654.7704480844.

The spelling of 280716028 in words is "two hundred eighty million, seven hundred sixteen thousand, twenty-eight".