28381230011 has 2 divisors, whose sum is σ = 28381230012. Its totient is φ = 28381230010.

The previous prime is 28381230001. The next prime is 28381230047. The reversal of 28381230011 is 11003218382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28381230011 - 2¹⁰ = 28381228987 is a prime.

It is not a weakly prime, because it can be changed into another prime (28381230001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14190615005 + 14190615006.

It is an arithmetic number, because the mean of its divisors is an integer number (14190615006).

Almost surely, 2^28381230011 is an apocalyptic number.

28381230011 is a deficient number, since it is larger than the sum of its proper divisors (1).

28381230011 is an equidigital number, since it uses as much as digits as its factorization.

28381230011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

Adding to 28381230011 its reverse (11003218382), we get a palindrome (39384448393).

The spelling of 28381230011 in words is "twenty-eight billion, three hundred eighty-one million, two hundred thirty thousand, eleven".