11809506 has 8 divisors (see below), whose sum is σ = 23619024. Its totient is φ = 3936500.

The previous prime is 11809493. The next prime is 11809541. The reversal of 11809506 is 60590811.

It is a happy number.

11809506 is nontrivially palindromic in base 5.

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

11809506 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 984120 + ... + 984131.

It is an arithmetic number, because the mean of its divisors is an integer number (2952378).

Almost surely, 2^11809506 is an apocalyptic number.

11809506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11809506 is a wasteful number, since it uses less digits than its factorization.

11809506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968256.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 11809506 is about 3436.4961807050. The cubic root of 11809506 is about 227.7249298947.

The spelling of 11809506 in words is "eleven million, eight hundred nine thousand, five hundred six".