28343338889 has 2 divisors, whose sum is σ = 28343338890. Its totient is φ = 28343338888.

The previous prime is 28343338883. The next prime is 28343338937. The reversal of 28343338889 is 98883334382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16044528889 + 12298810000 = 126667^2 + 110900^2 .

It is a cyclic number.

It is not a de Polignac number, because 28343338889 - 2⁴ = 28343338873 is a prime.

It is not a weakly prime, because it can be changed into another prime (28343338883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14171669444 + 14171669445.

It is an arithmetic number, because the mean of its divisors is an integer number (14171669445).

Almost surely, 2^28343338889 is an apocalyptic number.

It is an amenable number.

28343338889 is a deficient number, since it is larger than the sum of its proper divisors (1).

28343338889 is an equidigital number, since it uses as much as digits as its factorization.

28343338889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23887872, while the sum is 59.

The spelling of 28343338889 in words is "twenty-eight billion, three hundred forty-three million, three hundred thirty-eight thousand, eight hundred eighty-nine".