28834213 has 2 divisors, whose sum is σ = 28834214. Its totient is φ = 28834212.

The previous prime is 28834199. The next prime is 28834231. The reversal of 28834213 is 31243882.

Together with next prime (28834231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25020004 + 3814209 = 5002^2 + 1953^2 .

It is a cyclic number.

It is not a de Polignac number, because 28834213 - 2⁵ = 28834181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28834243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14417106 + 14417107.

It is an arithmetic number, because the mean of its divisors is an integer number (14417107).

Almost surely, 2^28834213 is an apocalyptic number.

It is an amenable number.

28834213 is a deficient number, since it is larger than the sum of its proper divisors (1).

28834213 is an equidigital number, since it uses as much as digits as its factorization.

28834213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 31.

The square root of 28834213 is about 5369.7498079519. The cubic root of 28834213 is about 306.6451033725.

The spelling of 28834213 in words is "twenty-eight million, eight hundred thirty-four thousand, two hundred thirteen".