28284439 has 2 divisors, whose sum is σ = 28284440. Its totient is φ = 28284438.

The previous prime is 28284397. The next prime is 28284463. The reversal of 28284439 is 93448282.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28284439 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28284469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14142219 + 14142220.

It is an arithmetic number, because the mean of its divisors is an integer number (14142220).

Almost surely, 2^28284439 is an apocalyptic number.

28284439 is a deficient number, since it is larger than the sum of its proper divisors (1).

28284439 is an equidigital number, since it uses as much as digits as its factorization.

28284439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 40.

The square root of 28284439 is about 5318.3116681894. The cubic root of 28284439 is about 304.6836781410.

The spelling of 28284439 in words is "twenty-eight million, two hundred eighty-four thousand, four hundred thirty-nine".