26213809 has 8 divisors (see below), whose sum is σ = 26586560. Its totient is φ = 25843536.

The previous prime is 26213791. The next prime is 26213833. The reversal of 26213809 is 90831262.

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 26213809 - 2⁵ = 26213777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26213009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31207 + ... + 32035.

It is an arithmetic number, because the mean of its divisors is an integer number (3323320).

Almost surely, 2^26213809 is an apocalyptic number.

It is an amenable number.

26213809 is a deficient number, since it is larger than the sum of its proper divisors (372751).

26213809 is a wasteful number, since it uses less digits than its factorization.

26213809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 26213809 is about 5119.9422848310. The cubic root of 26213809 is about 297.0594529297.

The spelling of 26213809 in words is "twenty-six million, two hundred thirteen thousand, eight hundred nine".