28005170 has 16 divisors (see below), whose sum is σ = 50474880. Its totient is φ = 11187504.

The previous prime is 28005163. The next prime is 28005199. The reversal of 28005170 is 7150082.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9761 + ... + 12299.

It is an arithmetic number, because the mean of its divisors is an integer number (3154680).

Almost surely, 2^28005170 is an apocalyptic number.

28005170 is a deficient number, since it is larger than the sum of its proper divisors (22469710).

28005170 is a wasteful number, since it uses less digits than its factorization.

28005170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 28005170 is about 5291.9911186622. The cubic root of 28005170 is about 303.6775855195.

The spelling of 28005170 in words is "twenty-eight million, five thousand, one hundred seventy".