28626647029 has 2 divisors, whose sum is σ = 28626647030. Its totient is φ = 28626647028.

The previous prime is 28626646921. The next prime is 28626647033. The reversal of 28626647029 is 92074662682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27003362929 + 1623284100 = 164327^2 + 40290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28626647029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28626642029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14313323514 + 14313323515.

It is an arithmetic number, because the mean of its divisors is an integer number (14313323515).

Almost surely, 2^28626647029 is an apocalyptic number.

It is an amenable number.

28626647029 is a deficient number, since it is larger than the sum of its proper divisors (1).

28626647029 is an equidigital number, since it uses as much as digits as its factorization.

28626647029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 28626647029 in words is "twenty-eight billion, six hundred twenty-six million, six hundred forty-seven thousand, twenty-nine".