28757711 has 2 divisors, whose sum is σ = 28757712. Its totient is φ = 28757710.

The previous prime is 28757699. The next prime is 28757713. The reversal of 28757711 is 11775782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28757711 - 2¹⁴ = 28741327 is a prime.

Together with 28757713, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28757713) 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, 14378855 + 14378856.

It is an arithmetic number, because the mean of its divisors is an integer number (14378856).

Almost surely, 2^28757711 is an apocalyptic number.

28757711 is a deficient number, since it is larger than the sum of its proper divisors (1).

28757711 is an equidigital number, since it uses as much as digits as its factorization.

28757711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27440, while the sum is 38.

The square root of 28757711 is about 5362.6216536317. The cubic root of 28757711 is about 306.3736695589.

The spelling of 28757711 in words is "twenty-eight million, seven hundred fifty-seven thousand, seven hundred eleven".