28128881119 has 2 divisors, whose sum is σ = 28128881120. Its totient is φ = 28128881118.

The previous prime is 28128881107. The next prime is 28128881129. The reversal of 28128881119 is 91118882182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28128881119 - 2⁵ = 28128881087 is a prime.

It is a super-2 number, since 2×28128881119² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28128881129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14064440559 + 14064440560.

It is an arithmetic number, because the mean of its divisors is an integer number (14064440560).

Almost surely, 2^28128881119 is an apocalyptic number.

28128881119 is a deficient number, since it is larger than the sum of its proper divisors (1).

28128881119 is an equidigital number, since it uses as much as digits as its factorization.

28128881119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147456, while the sum is 49.

The spelling of 28128881119 in words is "twenty-eight billion, one hundred twenty-eight million, eight hundred eighty-one thousand, one hundred nineteen".