28312128307 has 2 divisors, whose sum is σ = 28312128308. Its totient is φ = 28312128306.

The previous prime is 28312128283. The next prime is 28312128319. The reversal of 28312128307 is 70382121382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28312128307 - 2⁷ = 28312128179 is a prime.

It is not a weakly prime, because it can be changed into another prime (28312128407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14156064153 + 14156064154.

It is an arithmetic number, because the mean of its divisors is an integer number (14156064154).

Almost surely, 2^28312128307 is an apocalyptic number.

28312128307 is a deficient number, since it is larger than the sum of its proper divisors (1).

28312128307 is an equidigital number, since it uses as much as digits as its factorization.

28312128307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

Adding to 28312128307 its reverse (70382121382), we get a palindrome (98694249689).

The spelling of 28312128307 in words is "twenty-eight billion, three hundred twelve million, one hundred twenty-eight thousand, three hundred seven".