28108001 has 12 divisors (see below), whose sum is σ = 30104256. Its totient is φ = 26194080.

The previous prime is 28107991. The next prime is 28108019. The reversal of 28108001 is 10080182.

It is not a de Polignac number, because 28108001 - 2¹⁰ = 28106977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28108051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38300 + ... + 39026.

It is an arithmetic number, because the mean of its divisors is an integer number (2508688).

Almost surely, 2^28108001 is an apocalyptic number.

It is an amenable number.

28108001 is a deficient number, since it is larger than the sum of its proper divisors (1996255).

28108001 is an equidigital number, since it uses as much as digits as its factorization.

28108001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 28108001 is about 5301.6979355674. The cubic root of 28108001 is about 304.0488184815.

Adding to 28108001 its reverse (10080182), we get a palindrome (38188183).

The spelling of 28108001 in words is "twenty-eight million, one hundred eight thousand, one".