28638359 has 2 divisors, whose sum is σ = 28638360. Its totient is φ = 28638358.

The previous prime is 28638317. The next prime is 28638361. The reversal of 28638359 is 95383682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28638359 - 2¹⁶ = 28572823 is a prime.

It is a Sophie Germain prime.

Together with 28638361, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28637359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14319179 + 14319180.

It is an arithmetic number, because the mean of its divisors is an integer number (14319180).

Almost surely, 2^28638359 is an apocalyptic number.

28638359 is a deficient number, since it is larger than the sum of its proper divisors (1).

28638359 is an equidigital number, since it uses as much as digits as its factorization.

28638359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 28638359 is about 5351.4819442842. The cubic root of 28638359 is about 305.9492383082.

The spelling of 28638359 in words is "twenty-eight million, six hundred thirty-eight thousand, three hundred fifty-nine".