28023113 has 2 divisors, whose sum is σ = 28023114. Its totient is φ = 28023112.

The previous prime is 28023109. The next prime is 28023133. The reversal of 28023113 is 31132082.

It is an a-pointer prime, because the next prime (28023133) can be obtained adding 28023113 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18088009 + 9935104 = 4253^2 + 3152^2 .

It is a cyclic number.

It is not a de Polignac number, because 28023113 - 2² = 28023109 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28023103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14011556 + 14011557.

It is an arithmetic number, because the mean of its divisors is an integer number (14011557).

Almost surely, 2^28023113 is an apocalyptic number.

It is an amenable number.

28023113 is a deficient number, since it is larger than the sum of its proper divisors (1).

28023113 is an equidigital number, since it uses as much as digits as its factorization.

28023113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 28023113 is about 5293.6861448333. The cubic root of 28023113 is about 303.7424273996.

Adding to 28023113 its reverse (31132082), we get a palindrome (59155195).

The spelling of 28023113 in words is "twenty-eight million, twenty-three thousand, one hundred thirteen".