28888935791 has 2 divisors, whose sum is σ = 28888935792. Its totient is φ = 28888935790.

The previous prime is 28888935781. The next prime is 28888935797. The reversal of 28888935791 is 19753988882.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28888935791 is a prime.

It is a super-2 number, since 2×28888935791² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28888935797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14444467895 + 14444467896.

It is an arithmetic number, because the mean of its divisors is an integer number (14444467896).

Almost surely, 2^28888935791 is an apocalyptic number.

28888935791 is a deficient number, since it is larger than the sum of its proper divisors (1).

28888935791 is an equidigital number, since it uses as much as digits as its factorization.

28888935791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69672960, while the sum is 68.

The spelling of 28888935791 in words is "twenty-eight billion, eight hundred eighty-eight million, nine hundred thirty-five thousand, seven hundred ninety-one".