28471211 has 2 divisors, whose sum is σ = 28471212. Its totient is φ = 28471210.

The previous prime is 28471199. The next prime is 28471249. The reversal of 28471211 is 11217482.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28471211 is a prime.

It is not a weakly prime, because it can be changed into another prime (28471271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14235605 + 14235606.

It is an arithmetic number, because the mean of its divisors is an integer number (14235606).

Almost surely, 2^28471211 is an apocalyptic number.

28471211 is a deficient number, since it is larger than the sum of its proper divisors (1).

28471211 is an equidigital number, since it uses as much as digits as its factorization.

28471211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 26.

The square root of 28471211 is about 5335.8421078589. The cubic root of 28471211 is about 305.3528515085.

Adding to 28471211 its reverse (11217482), we get a palindrome (39688693).

It can be divided in two parts, 28471 and 211, that added together give a palindrome (28682).

The spelling of 28471211 in words is "twenty-eight million, four hundred seventy-one thousand, two hundred eleven".