28768111 has 2 divisors, whose sum is σ = 28768112. Its totient is φ = 28768110.

The previous prime is 28768081. The next prime is 28768123. The reversal of 28768111 is 11186782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28768111 - 2⁷ = 28767983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28708111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14384055 + 14384056.

It is an arithmetic number, because the mean of its divisors is an integer number (14384056).

Almost surely, 2^28768111 is an apocalyptic number.

28768111 is a deficient number, since it is larger than the sum of its proper divisors (1).

28768111 is an equidigital number, since it uses as much as digits as its factorization.

28768111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 34.

The square root of 28768111 is about 5363.5912409504. The cubic root of 28768111 is about 306.4105976503.

The spelling of 28768111 in words is "twenty-eight million, seven hundred sixty-eight thousand, one hundred eleven".