28225171 has 8 divisors (see below), whose sum is σ = 30580704. Its totient is φ = 25896000.

The previous prime is 28225147. The next prime is 28225177. The reversal of 28225171 is 17152282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28225171 - 2¹¹ = 28223123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28225177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4330 + ... + 8671.

It is an arithmetic number, because the mean of its divisors is an integer number (3822588).

Almost surely, 2^28225171 is an apocalyptic number.

28225171 is a deficient number, since it is larger than the sum of its proper divisors (2355533).

28225171 is a wasteful number, since it uses less digits than its factorization.

28225171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13181.

The product of its digits is 2240, while the sum is 28.

The square root of 28225171 is about 5312.7366770808. The cubic root of 28225171 is about 304.4707151049.

The spelling of 28225171 in words is "twenty-eight million, two hundred twenty-five thousand, one hundred seventy-one".