28005171 has 8 divisors (see below), whose sum is σ = 39536784. Its totient is φ = 17571840.

The previous prime is 28005163. The next prime is 28005199. The reversal of 28005171 is 17150082.

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

It is not a de Polignac number, because 28005171 - 2³ = 28005163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28005371) 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, 274510 + ... + 274611.

It is an arithmetic number, because the mean of its divisors is an integer number (4942098).

Almost surely, 2^28005171 is an apocalyptic number.

28005171 is a deficient number, since it is larger than the sum of its proper divisors (11531613).

28005171 is a wasteful number, since it uses less digits than its factorization.

28005171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549141.

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

The square root of 28005171 is about 5291.9912131446. The cubic root of 28005171 is about 303.6775891341.

The spelling of 28005171 in words is "twenty-eight million, five thousand, one hundred seventy-one".