28239893283 has 32 divisors (see below), whose sum is σ = 44291681280. Its totient is φ = 15666687360.

The previous prime is 28239893257. The next prime is 28239893299. The reversal of 28239893283 is 38239893282.

It is not a de Polignac number, because 28239893283 - 2¹⁰ = 28239892259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28239893233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 318778 + ... + 397616.

It is an arithmetic number, because the mean of its divisors is an integer number (1384115040).

Almost surely, 2^28239893283 is an apocalyptic number.

28239893283 is a deficient number, since it is larger than the sum of its proper divisors (16051787997).

28239893283 is a wasteful number, since it uses less digits than its factorization.

28239893283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79347.

The product of its digits is 8957952, while the sum is 57.

Subtracting 28239893283 from its reverse (38239893282), we obtain a palindrome (9999999999).

The spelling of 28239893283 in words is "twenty-eight billion, two hundred thirty-nine million, eight hundred ninety-three thousand, two hundred eighty-three".