28175197 has 4 divisors (see below), whose sum is σ = 28275040. Its totient is φ = 28075356.

The previous prime is 28175183. The next prime is 28175201. The reversal of 28175197 is 79157182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28175197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28175177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49497 + ... + 50062.

It is an arithmetic number, because the mean of its divisors is an integer number (7068760).

Almost surely, 2^28175197 is an apocalyptic number.

It is an amenable number.

28175197 is a deficient number, since it is larger than the sum of its proper divisors (99843).

28175197 is an equidigital number, since it uses as much as digits as its factorization.

28175197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99842.

The product of its digits is 35280, while the sum is 40.

The square root of 28175197 is about 5308.0313676541. The cubic root of 28175197 is about 304.2909156822.

The spelling of 28175197 in words is "twenty-eight million, one hundred seventy-five thousand, one hundred ninety-seven".