28188299 has 2 divisors, whose sum is σ = 28188300. Its totient is φ = 28188298.

The previous prime is 28188287. The next prime is 28188301. The reversal of 28188299 is 99288182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28188299 - 2¹² = 28184203 is a prime.

Together with 28188301, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28188239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14094149 + 14094150.

It is an arithmetic number, because the mean of its divisors is an integer number (14094150).

Almost surely, 2^28188299 is an apocalyptic number.

28188299 is a deficient number, since it is larger than the sum of its proper divisors (1).

28188299 is an equidigital number, since it uses as much as digits as its factorization.

28188299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 47.

The square root of 28188299 is about 5309.2653917468. The cubic root of 28188299 is about 304.3380753850.

The spelling of 28188299 in words is "twenty-eight million, one hundred eighty-eight thousand, two hundred ninety-nine".