28175001 has 32 divisors (see below), whose sum is σ = 41803776. Its totient is φ = 16800000.

The previous prime is 28174987. The next prime is 28175011. The reversal of 28175001 is 10057182.

It is not a de Polignac number, because 28175001 - 2⁷ = 28174873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28175011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112126 + ... + 112376.

It is an arithmetic number, because the mean of its divisors is an integer number (1306368).

It is a Poulet number, since it divides 2^28175000-1.

Almost surely, 2^28175001 is an apocalyptic number.

It is an amenable number.

28175001 is a deficient number, since it is larger than the sum of its proper divisors (13628775).

28175001 is a wasteful number, since it uses less digits than its factorization.

28175001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 28175001 is about 5308.0129050333. The cubic root of 28175001 is about 304.2902100834.

The spelling of 28175001 in words is "twenty-eight million, one hundred seventy-five thousand, one".