28847242681 has 2 divisors, whose sum is σ = 28847242682. Its totient is φ = 28847242680.

The previous prime is 28847242673. The next prime is 28847242729. The reversal of 28847242681 is 18624274882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16611343225 + 12235899456 = 128885^2 + 110616^2 .

It is a cyclic number.

It is not a de Polignac number, because 28847242681 - 2³ = 28847242673 is a prime.

It is a super-2 number, since 2×28847242681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28847242621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14423621340 + 14423621341.

It is an arithmetic number, because the mean of its divisors is an integer number (14423621341).

Almost surely, 2^28847242681 is an apocalyptic number.

It is an amenable number.

28847242681 is a deficient number, since it is larger than the sum of its proper divisors (1).

28847242681 is an equidigital number, since it uses as much as digits as its factorization.

28847242681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2752512, while the sum is 52.

The spelling of 28847242681 in words is "twenty-eight billion, eight hundred forty-seven million, two hundred forty-two thousand, six hundred eighty-one".