28928365787 has 2 divisors, whose sum is σ = 28928365788. Its totient is φ = 28928365786.

The previous prime is 28928365757. The next prime is 28928365841. The reversal of 28928365787 is 78756382982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28928365787 - 2¹² = 28928361691 is a prime.

It is not a weakly prime, because it can be changed into another prime (28928365757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14464182893 + 14464182894.

It is an arithmetic number, because the mean of its divisors is an integer number (14464182894).

Almost surely, 2^28928365787 is an apocalyptic number.

28928365787 is a deficient number, since it is larger than the sum of its proper divisors (1).

28928365787 is an equidigital number, since it uses as much as digits as its factorization.

28928365787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81285120, while the sum is 65.

The spelling of 28928365787 in words is "twenty-eight billion, nine hundred twenty-eight million, three hundred sixty-five thousand, seven hundred eighty-seven".