28939350481 has 2 divisors, whose sum is σ = 28939350482. Its totient is φ = 28939350480.

The previous prime is 28939350469. The next prime is 28939350541. The reversal of 28939350481 is 18405393982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23864070400 + 5075280081 = 154480^2 + 71241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28939350481 is a prime.

It is a super-2 number, since 2×28939350481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28939350431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14469675240 + 14469675241.

It is an arithmetic number, because the mean of its divisors is an integer number (14469675241).

Almost surely, 2^28939350481 is an apocalyptic number.

It is an amenable number.

28939350481 is a deficient number, since it is larger than the sum of its proper divisors (1).

28939350481 is an equidigital number, since it uses as much as digits as its factorization.

28939350481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 28939350481 in words is "twenty-eight billion, nine hundred thirty-nine million, three hundred fifty thousand, four hundred eighty-one".