28380113 has 2 divisors, whose sum is σ = 28380114. Its totient is φ = 28380112.

The previous prime is 28380083. The next prime is 28380139. The reversal of 28380113 is 31108382.

It is an a-pointer prime, because the next prime (28380139) can be obtained adding 28380113 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26956864 + 1423249 = 5192^2 + 1193^2 .

It is a cyclic number.

It is not a de Polignac number, because 28380113 - 2¹⁰ = 28379089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28380173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14190056 + 14190057.

It is an arithmetic number, because the mean of its divisors is an integer number (14190057).

Almost surely, 2^28380113 is an apocalyptic number.

It is an amenable number.

28380113 is a deficient number, since it is larger than the sum of its proper divisors (1).

28380113 is an equidigital number, since it uses as much as digits as its factorization.

28380113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 28380113 is about 5327.2988465075. The cubic root of 28380113 is about 305.0268291368.

Adding to 28380113 its reverse (31108382), we get a palindrome (59488495).

The spelling of 28380113 in words is "twenty-eight million, three hundred eighty thousand, one hundred thirteen".