28381163 has 2 divisors, whose sum is σ = 28381164. Its totient is φ = 28381162.

The previous prime is 28381147. The next prime is 28381187. The reversal of 28381163 is 36118382.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28381163 - 2⁴ = 28381147 is a prime.

It is not a weakly prime, because it can be changed into another prime (28381063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14190581 + 14190582.

It is an arithmetic number, because the mean of its divisors is an integer number (14190582).

Almost surely, 2^28381163 is an apocalyptic number.

28381163 is a deficient number, since it is larger than the sum of its proper divisors (1).

28381163 is an equidigital number, since it uses as much as digits as its factorization.

28381163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 28381163 is about 5327.3973946009. The cubic root of 28381163 is about 305.0305908581.

The spelling of 28381163 in words is "twenty-eight million, three hundred eighty-one thousand, one hundred sixty-three".