28385420071 has 2 divisors, whose sum is σ = 28385420072. Its totient is φ = 28385420070.

The previous prime is 28385420069. The next prime is 28385420093. The reversal of 28385420071 is 17002458382.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28385420071 - 2¹ = 28385420069 is a prime.

Together with 28385420069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28385420051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14192710035 + 14192710036.

It is an arithmetic number, because the mean of its divisors is an integer number (14192710036).

Almost surely, 2^28385420071 is an apocalyptic number.

28385420071 is a deficient number, since it is larger than the sum of its proper divisors (1).

28385420071 is an equidigital number, since it uses as much as digits as its factorization.

28385420071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 28385420071 in words is "twenty-eight billion, three hundred eighty-five million, four hundred twenty thousand, seventy-one".