28638367 has 2 divisors, whose sum is σ = 28638368. Its totient is φ = 28638366.

The previous prime is 28638361. The next prime is 28638383. The reversal of 28638367 is 76383682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28638367 - 2³ = 28638359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28638361) 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, 14319183 + 14319184.

It is an arithmetic number, because the mean of its divisors is an integer number (14319184).

Almost surely, 2^28638367 is an apocalyptic number.

28638367 is a deficient number, since it is larger than the sum of its proper divisors (1).

28638367 is an equidigital number, since it uses as much as digits as its factorization.

28638367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 43.

The square root of 28638367 is about 5351.4826917407. The cubic root of 28638367 is about 305.9492667967.

The spelling of 28638367 in words is "twenty-eight million, six hundred thirty-eight thousand, three hundred sixty-seven".