28393399 has 2 divisors, whose sum is σ = 28393400. Its totient is φ = 28393398.

The previous prime is 28393381. The next prime is 28393411. The reversal of 28393399 is 99339382.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28393399 - 2⁷ = 28393271 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28393369) 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, 14196699 + 14196700.

It is an arithmetic number, because the mean of its divisors is an integer number (14196700).

Almost surely, 2^28393399 is an apocalyptic number.

28393399 is a deficient number, since it is larger than the sum of its proper divisors (1).

28393399 is an equidigital number, since it uses as much as digits as its factorization.

28393399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 46.

The square root of 28393399 is about 5328.5456740090. The cubic root of 28393399 is about 305.0744206107.

The spelling of 28393399 in words is "twenty-eight million, three hundred ninety-three thousand, three hundred ninety-nine".