1028764787 has 2 divisors, whose sum is σ = 1028764788. Its totient is φ = 1028764786.

The previous prime is 1028764783. The next prime is 1028764871. The reversal of 1028764787 is 7874678201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1028764787 - 2² = 1028764783 is a prime.

It is not a weakly prime, because it can be changed into another prime (1028764783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514382393 + 514382394.

It is an arithmetic number, because the mean of its divisors is an integer number (514382394).

Almost surely, 2^1028764787 is an apocalyptic number.

1028764787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028764787 is an equidigital number, since it uses as much as digits as its factorization.

1028764787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1053696, while the sum is 50.

The square root of 1028764787 is about 32074.3633919677. The cubic root of 1028764787 is about 1009.4977691246.

The spelling of 1028764787 in words is "one billion, twenty-eight million, seven hundred sixty-four thousand, seven hundred eighty-seven".