23828809 has 2 divisors, whose sum is σ = 23828810. Its totient is φ = 23828808.

The previous prime is 23828803. The next prime is 23828839. The reversal of 23828809 is 90882832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23377225 + 451584 = 4835^2 + 672^2 .

It is a cyclic number.

It is not a de Polignac number, because 23828809 - 2⁷ = 23828681 is a prime.

It is not a weakly prime, because it can be changed into another prime (23828803) 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 as a sum of consecutive naturals, namely, 11914404 + 11914405.

It is an arithmetic number, because the mean of its divisors is an integer number (11914405).

Almost surely, 2^23828809 is an apocalyptic number.

It is an amenable number.

23828809 is a deficient number, since it is larger than the sum of its proper divisors (1).

23828809 is an equidigital number, since it uses as much as digits as its factorization.

23828809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 23828809 is about 4881.4761087196. The cubic root of 23828809 is about 287.7624431547.

The spelling of 23828809 in words is "twenty-three million, eight hundred twenty-eight thousand, eight hundred nine".