28857305489 has 2 divisors, whose sum is σ = 28857305490. Its totient is φ = 28857305488.

The previous prime is 28857305467. The next prime is 28857305501. The reversal of 28857305489 is 98450375882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28737030400 + 120275089 = 169520^2 + 10967^2 .

It is a cyclic number.

It is not a de Polignac number, because 28857305489 - 2²⁴ = 28840528273 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28857305429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14428652744 + 14428652745.

It is an arithmetic number, because the mean of its divisors is an integer number (14428652745).

Almost surely, 2^28857305489 is an apocalyptic number.

It is an amenable number.

28857305489 is a deficient number, since it is larger than the sum of its proper divisors (1).

28857305489 is an equidigital number, since it uses as much as digits as its factorization.

28857305489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19353600, while the sum is 59.

The spelling of 28857305489 in words is "twenty-eight billion, eight hundred fifty-seven million, three hundred five thousand, four hundred eighty-nine".