28596389 has 2 divisors, whose sum is σ = 28596390. Its totient is φ = 28596388.

The previous prime is 28596319. The next prime is 28596391. The reversal of 28596389 is 98369582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28408900 + 187489 = 5330^2 + 433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28596389 is a prime.

Together with 28596391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28596319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14298194 + 14298195.

It is an arithmetic number, because the mean of its divisors is an integer number (14298195).

Almost surely, 2^28596389 is an apocalyptic number.

It is an amenable number.

28596389 is a deficient number, since it is larger than the sum of its proper divisors (1).

28596389 is an equidigital number, since it uses as much as digits as its factorization.

28596389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 50.

The square root of 28596389 is about 5347.5591628331. The cubic root of 28596389 is about 305.7997073080.

The spelling of 28596389 in words is "twenty-eight million, five hundred ninety-six thousand, three hundred eighty-nine".