28675409 has 8 divisors (see below), whose sum is σ = 33234048. Its totient is φ = 24232320.

The previous prime is 28675391. The next prime is 28675469. The reversal of 28675409 is 90457682.

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

It is not a de Polignac number, because 28675409 - 2¹⁶ = 28609873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28675469) 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, 28352 + ... + 29345.

It is an arithmetic number, because the mean of its divisors is an integer number (4154256).

Almost surely, 2^28675409 is an apocalyptic number.

It is an amenable number.

28675409 is a deficient number, since it is larger than the sum of its proper divisors (4558639).

28675409 is an equidigital number, since it uses as much as digits as its factorization.

28675409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57775.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 28675409 is about 5354.9424833512. The cubic root of 28675409 is about 306.0811189385.

The spelling of 28675409 in words is "twenty-eight million, six hundred seventy-five thousand, four hundred nine".