28111607 has 2 divisors, whose sum is σ = 28111608. Its totient is φ = 28111606.

The previous prime is 28111579. The next prime is 28111613. The reversal of 28111607 is 70611182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28111607 - 2¹⁸ = 27849463 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28111627) 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, 14055803 + 14055804.

It is an arithmetic number, because the mean of its divisors is an integer number (14055804).

Almost surely, 2^28111607 is an apocalyptic number.

28111607 is a deficient number, since it is larger than the sum of its proper divisors (1).

28111607 is an equidigital number, since it uses as much as digits as its factorization.

28111607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 28111607 is about 5302.0380043904. The cubic root of 28111607 is about 304.0618201550.

Adding to 28111607 its reverse (70611182), we get a palindrome (98722789).

The spelling of 28111607 in words is "twenty-eight million, one hundred eleven thousand, six hundred seven".