28112113 has 2 divisors, whose sum is σ = 28112114. Its totient is φ = 28112112.

The previous prime is 28112111. The next prime is 28112131. The reversal of 28112113 is 31121182.

Together with next prime (28112131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24770529 + 3341584 = 4977^2 + 1828^2 .

It is a cyclic number.

It is not a de Polignac number, because 28112113 - 2¹ = 28112111 is a prime.

Together with 28112111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28112111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14056056 + 14056057.

It is an arithmetic number, because the mean of its divisors is an integer number (14056057).

Almost surely, 2^28112113 is an apocalyptic number.

It is an amenable number.

28112113 is a deficient number, since it is larger than the sum of its proper divisors (1).

28112113 is an equidigital number, since it uses as much as digits as its factorization.

28112113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 19.

The square root of 28112113 is about 5302.0857216760. The cubic root of 28112113 is about 304.0636444828.

Adding to 28112113 its reverse (31121182), we get a palindrome (59233295).

The spelling of 28112113 in words is "twenty-eight million, one hundred twelve thousand, one hundred thirteen".