28280280306 has 16 divisors (see below), whose sum is σ = 56967472800. Its totient is φ = 9358941408.

The previous prime is 28280280299. The next prime is 28280280313. The reversal of 28280280306 is 60308208282.

It is an interprime number because it is at equal distance from previous prime (28280280299) and next prime (28280280313).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16953771 + ... + 16955438.

It is an arithmetic number, because the mean of its divisors is an integer number (3560467050).

Almost surely, 2^28280280306 is an apocalyptic number.

28280280306 is an abundant number, since it is smaller than the sum of its proper divisors (28687192494).

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

28280280306 is a wasteful number, since it uses less digits than its factorization.

28280280306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33909353.

The product of its (nonzero) digits is 73728, while the sum is 39.

Adding to 28280280306 its reverse (60308208282), we get a palindrome (88588488588).

The spelling of 28280280306 in words is "twenty-eight billion, two hundred eighty million, two hundred eighty thousand, three hundred six".