28234439 has 2 divisors, whose sum is σ = 28234440. Its totient is φ = 28234438.

The previous prime is 28234421. The next prime is 28234477. The reversal of 28234439 is 93443282.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28234439 - 2⁸ = 28234183 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28234399 and 28234408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28234489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14117219 + 14117220.

It is an arithmetic number, because the mean of its divisors is an integer number (14117220).

Almost surely, 2^28234439 is an apocalyptic number.

28234439 is a deficient number, since it is larger than the sum of its proper divisors (1).

28234439 is an equidigital number, since it uses as much as digits as its factorization.

28234439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 35.

The square root of 28234439 is about 5313.6088489839. The cubic root of 28234439 is about 304.5040367310.

The spelling of 28234439 in words is "twenty-eight million, two hundred thirty-four thousand, four hundred thirty-nine".