28438211 has 2 divisors, whose sum is σ = 28438212. Its totient is φ = 28438210.

The previous prime is 28438199. The next prime is 28438213. The reversal of 28438211 is 11283482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28438211 - 2¹⁸ = 28176067 is a prime.

Together with 28438213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28438213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14219105 + 14219106.

It is an arithmetic number, because the mean of its divisors is an integer number (14219106).

Almost surely, 2^28438211 is an apocalyptic number.

28438211 is a deficient number, since it is larger than the sum of its proper divisors (1).

28438211 is an equidigital number, since it uses as much as digits as its factorization.

28438211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 29.

The square root of 28438211 is about 5332.7489158969. The cubic root of 28438211 is about 305.2348312415.

The spelling of 28438211 in words is "twenty-eight million, four hundred thirty-eight thousand, two hundred eleven".