28988858791 has 2 divisors, whose sum is σ = 28988858792. Its totient is φ = 28988858790.

The previous prime is 28988858783. The next prime is 28988858807. The reversal of 28988858791 is 19785888982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28988858791 - 2³ = 28988858783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28988858891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14494429395 + 14494429396.

It is an arithmetic number, because the mean of its divisors is an integer number (14494429396).

Almost surely, 2^28988858791 is an apocalyptic number.

28988858791 is a deficient number, since it is larger than the sum of its proper divisors (1).

28988858791 is an equidigital number, since it uses as much as digits as its factorization.

28988858791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185794560, while the sum is 73.

The spelling of 28988858791 in words is "twenty-eight billion, nine hundred eighty-eight million, eight hundred fifty-eight thousand, seven hundred ninety-one".