28117379 has 2 divisors, whose sum is σ = 28117380. Its totient is φ = 28117378.

The previous prime is 28117367. The next prime is 28117381. The reversal of 28117379 is 97371182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28117379 - 2²⁴ = 11340163 is a prime.

Together with 28117381, 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 (28117079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14058689 + 14058690.

It is an arithmetic number, because the mean of its divisors is an integer number (14058690).

Almost surely, 2^28117379 is an apocalyptic number.

28117379 is a deficient number, since it is larger than the sum of its proper divisors (1).

28117379 is an equidigital number, since it uses as much as digits as its factorization.

28117379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 38.

The square root of 28117379 is about 5302.5822954481. The cubic root of 28117379 is about 304.0826291720.

The spelling of 28117379 in words is "twenty-eight million, one hundred seventeen thousand, three hundred seventy-nine".