28041113 has 2 divisors, whose sum is σ = 28041114. Its totient is φ = 28041112.

The previous prime is 28041077. The next prime is 28041127. The reversal of 28041113 is 31114082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20043529 + 7997584 = 4477^2 + 2828^2 .

It is a cyclic number.

It is not a de Polignac number, because 28041113 - 2¹² = 28037017 is a prime.

It is not a weakly prime, because it can be changed into another prime (28041133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14020556 + 14020557.

It is an arithmetic number, because the mean of its divisors is an integer number (14020557).

Almost surely, 2^28041113 is an apocalyptic number.

It is an amenable number.

28041113 is a deficient number, since it is larger than the sum of its proper divisors (1).

28041113 is an equidigital number, since it uses as much as digits as its factorization.

28041113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 28041113 is about 5295.3860104812. The cubic root of 28041113 is about 303.8074474600.

Adding to 28041113 its reverse (31114082), we get a palindrome (59155195).

The spelling of 28041113 in words is "twenty-eight million, forty-one thousand, one hundred thirteen".