28907579 has 4 divisors (see below), whose sum is σ = 29314800. Its totient is φ = 28500360.

The previous prime is 28907551. The next prime is 28907587. The reversal of 28907579 is 97570982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28907579 - 2¹⁶ = 28842043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28907509) 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 3 ways as a sum of consecutive naturals, for example, 203504 + ... + 203645.

It is an arithmetic number, because the mean of its divisors is an integer number (7328700).

Almost surely, 2^28907579 is an apocalyptic number.

28907579 is a deficient number, since it is larger than the sum of its proper divisors (407221).

28907579 is an equidigital number, since it uses as much as digits as its factorization.

28907579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407220.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 28907579 is about 5376.5768849706. The cubic root of 28907579 is about 306.9049598468.

The spelling of 28907579 in words is "twenty-eight million, nine hundred seven thousand, five hundred seventy-nine".