28341689 has 2 divisors, whose sum is σ = 28341690. Its totient is φ = 28341688.

The previous prime is 28341661. The next prime is 28341707. The reversal of 28341689 is 98614382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16321600 + 12020089 = 4040^2 + 3467^2 .

It is a cyclic number.

It is not a de Polignac number, because 28341689 - 2¹² = 28337593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28344689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14170844 + 14170845.

It is an arithmetic number, because the mean of its divisors is an integer number (14170845).

Almost surely, 2^28341689 is an apocalyptic number.

It is an amenable number.

28341689 is a deficient number, since it is larger than the sum of its proper divisors (1).

28341689 is an equidigital number, since it uses as much as digits as its factorization.

28341689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 28341689 is about 5323.6912945812. The cubic root of 28341689 is about 304.8891077650.

The spelling of 28341689 in words is "twenty-eight million, three hundred forty-one thousand, six hundred eighty-nine".