28324393 has 2 divisors, whose sum is σ = 28324394. Its totient is φ = 28324392.

The previous prime is 28324381. The next prime is 28324411. The reversal of 28324393 is 39342382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16297369 + 12027024 = 4037^2 + 3468^2 .

It is a cyclic number.

It is not a de Polignac number, because 28324393 - 2⁹ = 28323881 is a prime.

It is not a weakly prime, because it can be changed into another prime (28324343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14162196 + 14162197.

It is an arithmetic number, because the mean of its divisors is an integer number (14162197).

Almost surely, 2^28324393 is an apocalyptic number.

It is an amenable number.

28324393 is a deficient number, since it is larger than the sum of its proper divisors (1).

28324393 is an equidigital number, since it uses as much as digits as its factorization.

28324393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 28324393 is about 5322.0666098800. The cubic root of 28324393 is about 304.8270738816.

It can be divided in two parts, 2832 and 4393, that added together give a square (7225 = 85²).

The spelling of 28324393 in words is "twenty-eight million, three hundred twenty-four thousand, three hundred ninety-three".