28321233307 has 2 divisors, whose sum is σ = 28321233308. Its totient is φ = 28321233306.

The previous prime is 28321233263. The next prime is 28321233341. The reversal of 28321233307 is 70333212382.

It is an a-pointer prime, because the next prime (28321233341) can be obtained adding 28321233307 to its sum of digits (34).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28321233307 - 2⁷ = 28321233179 is a prime.

It is not a weakly prime, because it can be changed into another prime (28321233407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14160616653 + 14160616654.

It is an arithmetic number, because the mean of its divisors is an integer number (14160616654).

Almost surely, 2^28321233307 is an apocalyptic number.

28321233307 is a deficient number, since it is larger than the sum of its proper divisors (1).

28321233307 is an equidigital number, since it uses as much as digits as its factorization.

28321233307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 34.

Adding to 28321233307 its reverse (70333212382), we get a palindrome (98654445689).

The spelling of 28321233307 in words is "twenty-eight billion, three hundred twenty-one million, two hundred thirty-three thousand, three hundred seven".