28135232311 has 4 divisors (see below), whose sum is σ = 28137739392. Its totient is φ = 28132725232.

The previous prime is 28135232297. The next prime is 28135232317. The reversal of 28135232311 is 11323253182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28135232311 - 2⁹ = 28135231799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28135232317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1236631 + ... + 1259176.

It is an arithmetic number, because the mean of its divisors is an integer number (7034434848).

Almost surely, 2^28135232311 is an apocalyptic number.

28135232311 is a deficient number, since it is larger than the sum of its proper divisors (2507081).

28135232311 is a wasteful number, since it uses less digits than its factorization.

28135232311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507080.

The product of its digits is 8640, while the sum is 31.

Adding to 28135232311 its reverse (11323253182), we get a palindrome (39458485493).

The spelling of 28135232311 in words is "twenty-eight billion, one hundred thirty-five million, two hundred thirty-two thousand, three hundred eleven".