28170009 has 24 divisors (see below), whose sum is σ = 48527232. Its totient is φ = 15396480.

The previous prime is 28170007. The next prime is 28170053. The reversal of 28170009 is 90007182.

28170009 = 241³ + 242³.

It is not a de Polignac number, because 28170009 - 2¹ = 28170007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28170007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8272 + ... + 11169.

It is an arithmetic number, because the mean of its divisors is an integer number (2021968).

Almost surely, 2^28170009 is an apocalyptic number.

It is an amenable number.

28170009 is a deficient number, since it is larger than the sum of its proper divisors (20357223).

28170009 is a wasteful number, since it uses less digits than its factorization.

28170009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19477 (or 19474 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 28170009 is about 5307.5426517363. The cubic root of 28170009 is about 304.2722378101.

The spelling of 28170009 in words is "twenty-eight million, one hundred seventy thousand, nine".