28328895191 has 2 divisors, whose sum is σ = 28328895192. Its totient is φ = 28328895190.

The previous prime is 28328895187. The next prime is 28328895233. The reversal of 28328895191 is 19159882382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28328895191 - 2² = 28328895187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28328895181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14164447595 + 14164447596.

It is an arithmetic number, because the mean of its divisors is an integer number (14164447596).

Almost surely, 2^28328895191 is an apocalyptic number.

28328895191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28328895191 is an equidigital number, since it uses as much as digits as its factorization.

28328895191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 56.

The spelling of 28328895191 in words is "twenty-eight billion, three hundred twenty-eight million, eight hundred ninety-five thousand, one hundred ninety-one".