28736729347 has 2 divisors, whose sum is σ = 28736729348. Its totient is φ = 28736729346.

The previous prime is 28736729323. The next prime is 28736729353. The reversal of 28736729347 is 74392763782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28736729347 - 2³¹ = 26589245699 is a prime.

It is a super-2 number, since 2×28736729347² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28736729291 and 28736729300.

It is not a weakly prime, because it can be changed into another prime (28736729647) 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, 14368364673 + 14368364674.

It is an arithmetic number, because the mean of its divisors is an integer number (14368364674).

Almost surely, 2^28736729347 is an apocalyptic number.

28736729347 is a deficient number, since it is larger than the sum of its proper divisors (1).

28736729347 is an equidigital number, since it uses as much as digits as its factorization.

28736729347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21337344, while the sum is 58.

The spelling of 28736729347 in words is "twenty-eight billion, seven hundred thirty-six million, seven hundred twenty-nine thousand, three hundred forty-seven".