28789567 has 2 divisors, whose sum is σ = 28789568. Its totient is φ = 28789566.

The previous prime is 28789543. The next prime is 28789571. The reversal of 28789567 is 76598782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28789567 - 2¹¹ = 28787519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28789597) 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, 14394783 + 14394784.

It is an arithmetic number, because the mean of its divisors is an integer number (14394784).

Almost surely, 2^28789567 is an apocalyptic number.

28789567 is a deficient number, since it is larger than the sum of its proper divisors (1).

28789567 is an equidigital number, since it uses as much as digits as its factorization.

28789567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 52.

The square root of 28789567 is about 5365.5910205680. The cubic root of 28789567 is about 306.4867550319.

The spelling of 28789567 in words is "twenty-eight million, seven hundred eighty-nine thousand, five hundred sixty-seven".