28711307 has 2 divisors, whose sum is σ = 28711308. Its totient is φ = 28711306.

The previous prime is 28711289. The next prime is 28711339. The reversal of 28711307 is 70311782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28711307 - 2¹⁴ = 28694923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28711307.

It is not a weakly prime, because it can be changed into another prime (28711367) 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, 14355653 + 14355654.

It is an arithmetic number, because the mean of its divisors is an integer number (14355654).

Almost surely, 2^28711307 is an apocalyptic number.

28711307 is a deficient number, since it is larger than the sum of its proper divisors (1).

28711307 is an equidigital number, since it uses as much as digits as its factorization.

28711307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 28711307 is about 5358.2932917115. The cubic root of 28711307 is about 306.2087906789.

The spelling of 28711307 in words is "twenty-eight million, seven hundred eleven thousand, three hundred seven".