28788049 has 2 divisors, whose sum is σ = 28788050. Its totient is φ = 28788048.

The previous prime is 28788037. The next prime is 28788077. The reversal of 28788049 is 94088782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28569025 + 219024 = 5345^2 + 468^2 .

It is a cyclic number.

It is not a de Polignac number, because 28788049 - 2⁷ = 28787921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28788079) 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, 14394024 + 14394025.

It is an arithmetic number, because the mean of its divisors is an integer number (14394025).

Almost surely, 2^28788049 is an apocalyptic number.

It is an amenable number.

28788049 is a deficient number, since it is larger than the sum of its proper divisors (1).

28788049 is an equidigital number, since it uses as much as digits as its factorization.

28788049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 28788049 is about 5365.4495617795. The cubic root of 28788049 is about 306.4813681838.

The spelling of 28788049 in words is "twenty-eight million, seven hundred eighty-eight thousand, forty-nine".