11438209 has 8 divisors (see below), whose sum is σ = 12456000. Its totient is φ = 10462032.

The previous prime is 11438197. The next prime is 11438213. The reversal of 11438209 is 90283411.

It is a happy number.

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 11438209 - 2¹³ = 11430017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11438239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9829 + ... + 10930.

It is an arithmetic number, because the mean of its divisors is an integer number (1557000).

Almost surely, 2^11438209 is an apocalyptic number.

11438209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11438209 is a deficient number, since it is larger than the sum of its proper divisors (1017791).

11438209 is a wasteful number, since it uses less digits than its factorization.

11438209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20807.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 11438209 is about 3382.0421345690. The cubic root of 11438209 is about 225.3128750163.

The spelling of 11438209 in words is "eleven million, four hundred thirty-eight thousand, two hundred nine".