28630211 has 2 divisors, whose sum is σ = 28630212. Its totient is φ = 28630210.

The previous prime is 28630187. The next prime is 28630219. The reversal of 28630211 is 11203682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28630211 - 2¹⁰ = 28629187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28630219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14315105 + 14315106.

It is an arithmetic number, because the mean of its divisors is an integer number (14315106).

Almost surely, 2^28630211 is an apocalyptic number.

28630211 is a deficient number, since it is larger than the sum of its proper divisors (1).

28630211 is an equidigital number, since it uses as much as digits as its factorization.

28630211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 28630211 is about 5350.7206056755. The cubic root of 28630211 is about 305.9202199922.

Adding to 28630211 its reverse (11203682), we get a palindrome (39833893).

The spelling of 28630211 in words is "twenty-eight million, six hundred thirty thousand, two hundred eleven".