28285260481 has 2 divisors, whose sum is σ = 28285260482. Its totient is φ = 28285260480.

The previous prime is 28285260473. The next prime is 28285260517. The reversal of 28285260481 is 18406258282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26653827600 + 1631432881 = 163260^2 + 40391^2 .

It is a cyclic number.

It is not a de Polignac number, because 28285260481 - 2³ = 28285260473 is a prime.

It is a super-2 number, since 2×28285260481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28285260881) 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, 14142630240 + 14142630241.

It is an arithmetic number, because the mean of its divisors is an integer number (14142630241).

Almost surely, 2^28285260481 is an apocalyptic number.

It is an amenable number.

28285260481 is a deficient number, since it is larger than the sum of its proper divisors (1).

28285260481 is an equidigital number, since it uses as much as digits as its factorization.

28285260481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 491520, while the sum is 46.

The spelling of 28285260481 in words is "twenty-eight billion, two hundred eighty-five million, two hundred sixty thousand, four hundred eighty-one".