28729808027 has 2 divisors, whose sum is σ = 28729808028. Its totient is φ = 28729808026.

The previous prime is 28729807991. The next prime is 28729808077. The reversal of 28729808027 is 72080892782.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28729808027 - 2¹⁶ = 28729742491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28729808027.

It is not a weakly prime, because it can be changed into another prime (28729808077) 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, 14364904013 + 14364904014.

It is an arithmetic number, because the mean of its divisors is an integer number (14364904014).

Almost surely, 2^28729808027 is an apocalyptic number.

28729808027 is a deficient number, since it is larger than the sum of its proper divisors (1).

28729808027 is an equidigital number, since it uses as much as digits as its factorization.

28729808027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1806336, while the sum is 53.

The spelling of 28729808027 in words is "twenty-eight billion, seven hundred twenty-nine million, eight hundred eight thousand, twenty-seven".