28770420073 has 2 divisors, whose sum is σ = 28770420074. Its totient is φ = 28770420072.

The previous prime is 28770420071. The next prime is 28770420097. The reversal of 28770420073 is 37002407782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22712599849 + 6057820224 = 150707^2 + 77832^2 .

It is a cyclic number.

It is not a de Polignac number, because 28770420073 - 2¹ = 28770420071 is a prime.

Together with 28770420071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28770420071) 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, 14385210036 + 14385210037.

It is an arithmetic number, because the mean of its divisors is an integer number (14385210037).

Almost surely, 2^28770420073 is an apocalyptic number.

It is an amenable number.

28770420073 is a deficient number, since it is larger than the sum of its proper divisors (1).

28770420073 is an equidigital number, since it uses as much as digits as its factorization.

28770420073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131712, while the sum is 40.

The spelling of 28770420073 in words is "twenty-eight billion, seven hundred seventy million, four hundred twenty thousand, seventy-three".