280300030506 has 48 divisors (see below), whose sum is σ = 610042684680. Its totient is φ = 93014231040.

The previous prime is 280300030433. The next prime is 280300030529. The reversal of 280300030506 is 605030003082.

280300030506 is a `hidden beast` number, since 280 + 300 + 0 + 30 + 50 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 263794204881 + 16505825625 = 513609^2 + 128475^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 280300030506.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15317010 + ... + 15335298.

Almost surely, 2^280300030506 is an apocalyptic number.

280300030506 is an abundant number, since it is smaller than the sum of its proper divisors (329742654174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

280300030506 is a wasteful number, since it uses less digits than its factorization.

280300030506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22071 (or 22068 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 280300030506 its reverse (605030003082), we get a palindrome (885330033588).

The spelling of 280300030506 in words is "two hundred eighty billion, three hundred million, thirty thousand, five hundred six".