28228481137 has 2 divisors, whose sum is σ = 28228481138. Its totient is φ = 28228481136.

The previous prime is 28228481131. The next prime is 28228481161. The reversal of 28228481137 is 73118482282.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27570609936 + 657871201 = 166044^2 + 25649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28228481137 is a prime.

It is not a weakly prime, because it can be changed into another prime (28228481131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14114240568 + 14114240569.

It is an arithmetic number, because the mean of its divisors is an integer number (14114240569).

Almost surely, 2^28228481137 is an apocalyptic number.

It is an amenable number.

28228481137 is a deficient number, since it is larger than the sum of its proper divisors (1).

28228481137 is an equidigital number, since it uses as much as digits as its factorization.

28228481137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 344064, while the sum is 46.

The spelling of 28228481137 in words is "twenty-eight billion, two hundred twenty-eight million, four hundred eighty-one thousand, one hundred thirty-seven".