28296439 has 2 divisors, whose sum is σ = 28296440. Its totient is φ = 28296438.

The previous prime is 28296427. The next prime is 28296461. The reversal of 28296439 is 93469282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28296439 - 2¹¹ = 28294391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28296395 and 28296404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28296409) 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, 14148219 + 14148220.

It is an arithmetic number, because the mean of its divisors is an integer number (14148220).

Almost surely, 2^28296439 is an apocalyptic number.

28296439 is a deficient number, since it is larger than the sum of its proper divisors (1).

28296439 is an equidigital number, since it uses as much as digits as its factorization.

28296439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 28296439 is about 5319.4397261366. The cubic root of 28296439 is about 304.7267605722.

It can be divided in two parts, 282 and 96439, that added together give a square (96721 = 311²).

The spelling of 28296439 in words is "twenty-eight million, two hundred ninety-six thousand, four hundred thirty-nine".