28340345507 has 2 divisors, whose sum is σ = 28340345508. Its totient is φ = 28340345506.

The previous prime is 28340345377. The next prime is 28340345519. The reversal of 28340345507 is 70554304382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28340345507 - 2⁸ = 28340345251 is a prime.

It is a super-2 number, since 2×28340345507² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28340345107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14170172753 + 14170172754.

It is an arithmetic number, because the mean of its divisors is an integer number (14170172754).

Almost surely, 2^28340345507 is an apocalyptic number.

28340345507 is a deficient number, since it is larger than the sum of its proper divisors (1).

28340345507 is an equidigital number, since it uses as much as digits as its factorization.

28340345507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 41.

Adding to 28340345507 its reverse (70554304382), we get a palindrome (98894649889).

The spelling of 28340345507 in words is "twenty-eight billion, three hundred forty million, three hundred forty-five thousand, five hundred seven".