28108019 has 2 divisors, whose sum is σ = 28108020. Its totient is φ = 28108018.

The previous prime is 28107991. The next prime is 28108027. The reversal of 28108019 is 91080182.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28108019 is a prime.

It is a super-2 number, since 2×28108019² = 1580121464208722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28107982 and 28108000.

It is not a weakly prime, because it can be changed into another prime (28108219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14054009 + 14054010.

It is an arithmetic number, because the mean of its divisors is an integer number (14054010).

Almost surely, 2^28108019 is an apocalyptic number.

28108019 is a deficient number, since it is larger than the sum of its proper divisors (1).

28108019 is an equidigital number, since it uses as much as digits as its factorization.

28108019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 28108019 is about 5301.6996331365. The cubic root of 28108019 is about 304.0488833845.

The spelling of 28108019 in words is "twenty-eight million, one hundred eight thousand, nineteen".