28935809 has 8 divisors (see below), whose sum is σ = 33111168. Its totient is φ = 24770880.

The previous prime is 28935799. The next prime is 28935839. The reversal of 28935809 is 90853982.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28935809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28935809.

It is not an unprimeable number, because it can be changed into a prime (28935839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4724 + ... + 8954.

It is an arithmetic number, because the mean of its divisors is an integer number (4138896).

Almost surely, 2^28935809 is an apocalyptic number.

It is an amenable number.

28935809 is a deficient number, since it is larger than the sum of its proper divisors (4175359).

28935809 is an equidigital number, since it uses as much as digits as its factorization.

28935809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5215.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 28935809 is about 5379.2015206720. The cubic root of 28935809 is about 307.0048310981.

The spelling of 28935809 in words is "twenty-eight million, nine hundred thirty-five thousand, eight hundred nine".