28351392389 has 2 divisors, whose sum is σ = 28351392390. Its totient is φ = 28351392388.

The previous prime is 28351392347. The next prime is 28351392397. The reversal of 28351392389 is 98329315382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18832072900 + 9519319489 = 137230^2 + 97567^2 .

It is a cyclic number.

It is not a de Polignac number, because 28351392389 - 2²⁸ = 28082956933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28351392389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28351392689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14175696194 + 14175696195.

It is an arithmetic number, because the mean of its divisors is an integer number (14175696195).

Almost surely, 2^28351392389 is an apocalyptic number.

It is an amenable number.

28351392389 is a deficient number, since it is larger than the sum of its proper divisors (1).

28351392389 is an equidigital number, since it uses as much as digits as its factorization.

28351392389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 53.

The spelling of 28351392389 in words is "twenty-eight billion, three hundred fifty-one million, three hundred ninety-two thousand, three hundred eighty-nine".