28288499 has 2 divisors, whose sum is σ = 28288500. Its totient is φ = 28288498.

The previous prime is 28288439. The next prime is 28288529. The reversal of 28288499 is 99488282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28288499 - 2⁸ = 28288243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28288409) 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, 14144249 + 14144250.

It is an arithmetic number, because the mean of its divisors is an integer number (14144250).

Almost surely, 2^28288499 is an apocalyptic number.

28288499 is a deficient number, since it is larger than the sum of its proper divisors (1).

28288499 is an equidigital number, since it uses as much as digits as its factorization.

28288499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 50.

The square root of 28288499 is about 5318.6933545750. The cubic root of 28288499 is about 304.6982557273.

The spelling of 28288499 in words is "twenty-eight million, two hundred eighty-eight thousand, four hundred ninety-nine".