28768567 has 2 divisors, whose sum is σ = 28768568. Its totient is φ = 28768566.

The previous prime is 28768543. The next prime is 28768631. The reversal of 28768567 is 76586782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28768567 - 2¹¹ = 28766519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28768567.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28768507) 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, 14384283 + 14384284.

It is an arithmetic number, because the mean of its divisors is an integer number (14384284).

Almost surely, 2^28768567 is an apocalyptic number.

28768567 is a deficient number, since it is larger than the sum of its proper divisors (1).

28768567 is an equidigital number, since it uses as much as digits as its factorization.

28768567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 49.

The square root of 28768567 is about 5363.6337496142. The cubic root of 28768567 is about 306.4122166014.

The spelling of 28768567 in words is "twenty-eight million, seven hundred sixty-eight thousand, five hundred sixty-seven".