28764287999 has 2 divisors, whose sum is σ = 28764288000. Its totient is φ = 28764287998.

The previous prime is 28764287989. The next prime is 28764288011. The reversal of 28764287999 is 99978246782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28764287999 - 2⁸ = 28764287743 is a prime.

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 (28764287939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14382143999 + 14382144000.

It is an arithmetic number, because the mean of its divisors is an integer number (14382144000).

Almost surely, 2^28764287999 is an apocalyptic number.

28764287999 is a deficient number, since it is larger than the sum of its proper divisors (1).

28764287999 is an equidigital number, since it uses as much as digits as its factorization.

28764287999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 219469824, while the sum is 71.

The spelling of 28764287999 in words is "twenty-eight billion, seven hundred sixty-four million, two hundred eighty-seven thousand, nine hundred ninety-nine".