28366399 has 2 divisors, whose sum is σ = 28366400. Its totient is φ = 28366398.

The previous prime is 28366397. The next prime is 28366441. The reversal of 28366399 is 99366382.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28366399 - 2¹ = 28366397 is a prime.

Together with 28366397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28366397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14183199 + 14183200.

It is an arithmetic number, because the mean of its divisors is an integer number (14183200).

Almost surely, 2^28366399 is an apocalyptic number.

28366399 is a deficient number, since it is larger than the sum of its proper divisors (1).

28366399 is an equidigital number, since it uses as much as digits as its factorization.

28366399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 46.

The square root of 28366399 is about 5326.0115471148. The cubic root of 28366399 is about 304.9776889529.

The spelling of 28366399 in words is "twenty-eight million, three hundred sixty-six thousand, three hundred ninety-nine".