28711134203 has 4 divisors (see below), whose sum is σ = 28720342560. Its totient is φ = 28701925848.

The previous prime is 28711134181. The next prime is 28711134349. The reversal of 28711134203 is 30243111782.

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 28711134203 - 2¹⁴ = 28711117819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28711134203.

It is not an unprimeable number, because it can be changed into a prime (28711134503) 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, 4599500 + ... + 4605737.

It is an arithmetic number, because the mean of its divisors is an integer number (7180085640).

Almost surely, 2^28711134203 is an apocalyptic number.

28711134203 is a deficient number, since it is larger than the sum of its proper divisors (9208357).

28711134203 is an equidigital number, since it uses as much as digits as its factorization.

28711134203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9208356.

The product of its (nonzero) digits is 8064, while the sum is 32.

Adding to 28711134203 its reverse (30243111782), we get a palindrome (58954245985).

The spelling of 28711134203 in words is "twenty-eight billion, seven hundred eleven million, one hundred thirty-four thousand, two hundred three".