28062721787 has 2 divisors, whose sum is σ = 28062721788. Its totient is φ = 28062721786.

The previous prime is 28062721741. The next prime is 28062721793. The reversal of 28062721787 is 78712726082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28062721787 - 2¹² = 28062717691 is a prime.

It is not a weakly prime, because it can be changed into another prime (28062721087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14031360893 + 14031360894.

It is an arithmetic number, because the mean of its divisors is an integer number (14031360894).

Almost surely, 2^28062721787 is an apocalyptic number.

28062721787 is a deficient number, since it is larger than the sum of its proper divisors (1).

28062721787 is an equidigital number, since it uses as much as digits as its factorization.

28062721787 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 spelling of 28062721787 in words is "twenty-eight billion, sixty-two million, seven hundred twenty-one thousand, seven hundred eighty-seven".