28354439 has 2 divisors, whose sum is σ = 28354440. Its totient is φ = 28354438.

The previous prime is 28354433. The next prime is 28354451. The reversal of 28354439 is 93445382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28354439 - 2¹⁶ = 28288903 is a prime.

It is a super-2 number, since 2×28354439² = 1607948422009442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28354433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14177219 + 14177220.

It is an arithmetic number, because the mean of its divisors is an integer number (14177220).

Almost surely, 2^28354439 is an apocalyptic number.

28354439 is a deficient number, since it is larger than the sum of its proper divisors (1).

28354439 is an equidigital number, since it uses as much as digits as its factorization.

28354439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The square root of 28354439 is about 5324.8886373332. Note that the first 3 decimals coincide. The cubic root of 28354439 is about 304.9348207939.

The spelling of 28354439 in words is "twenty-eight million, three hundred fifty-four thousand, four hundred thirty-nine".