28320832993 has 2 divisors, whose sum is σ = 28320832994. Its totient is φ = 28320832992.

The previous prime is 28320832957. The next prime is 28320833039. The reversal of 28320832993 is 39923802382.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22628583184 + 5692249809 = 150428^2 + 75447^2 .

It is a cyclic number.

It is not a de Polignac number, because 28320832993 - 2⁹ = 28320832481 is a prime.

It is not a weakly prime, because it can be changed into another prime (28320832913) 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, 14160416496 + 14160416497.

It is an arithmetic number, because the mean of its divisors is an integer number (14160416497).

Almost surely, 2^28320832993 is an apocalyptic number.

It is an amenable number.

28320832993 is a deficient number, since it is larger than the sum of its proper divisors (1).

28320832993 is an equidigital number, since it uses as much as digits as its factorization.

28320832993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The spelling of 28320832993 in words is "twenty-eight billion, three hundred twenty million, eight hundred thirty-two thousand, nine hundred ninety-three".