28564337 has 2 divisors, whose sum is σ = 28564338. Its totient is φ = 28564336.

The previous prime is 28564313. The next prime is 28564339. The reversal of 28564337 is 73346582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19855936 + 8708401 = 4456^2 + 2951^2 .

It is a cyclic number.

It is not a de Polignac number, because 28564337 - 2⁶ = 28564273 is a prime.

Together with 28564339, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28564337.

It is not a weakly prime, because it can be changed into another prime (28564339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14282168 + 14282169.

It is an arithmetic number, because the mean of its divisors is an integer number (14282169).

Almost surely, 2^28564337 is an apocalyptic number.

It is an amenable number.

28564337 is a deficient number, since it is larger than the sum of its proper divisors (1).

28564337 is an equidigital number, since it uses as much as digits as its factorization.

28564337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 38.

The square root of 28564337 is about 5344.5614413158. The cubic root of 28564337 is about 305.6854136645.

The spelling of 28564337 in words is "twenty-eight million, five hundred sixty-four thousand, three hundred thirty-seven".