28675009 has 8 divisors (see below), whose sum is σ = 32928480. Its totient is φ = 24696000.

The previous prime is 28674977. The next prime is 28675013. The reversal of 28675009 is 90057682.

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

It is a cyclic number.

It is not a de Polignac number, because 28675009 - 2⁵ = 28674977 is a prime.

It is a super-2 number, since 2×28675009² = 1644512282300162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28675019) by changing a digit.

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, 68392 + ... + 68809.

It is an arithmetic number, because the mean of its divisors is an integer number (4116060).

Almost surely, 2^28675009 is an apocalyptic number.

It is an amenable number.

28675009 is a deficient number, since it is larger than the sum of its proper divisors (4253471).

28675009 is a wasteful number, since it uses less digits than its factorization.

28675009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137231.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 28675009 is about 5354.9051345472. The cubic root of 28675009 is about 306.0796957328.

The spelling of 28675009 in words is "twenty-eight million, six hundred seventy-five thousand, nine".