10438209 has 12 divisors (see below), whose sum is σ = 15105636. Its totient is φ = 6945792.

The previous prime is 10438199. The next prime is 10438213. The reversal of 10438209 is 90283401.

It can be written as a sum of positive squares in 2 ways, for example, as 3920400 + 6517809 = 1980^2 + 2553^2 .

It is not a de Polignac number, because 10438209 - 2⁴ = 10438193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10438279) 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 11 ways as a sum of consecutive naturals, for example, 7969 + ... + 9185.

It is an arithmetic number, because the mean of its divisors is an integer number (1258803).

Almost surely, 2^10438209 is an apocalyptic number.

It is an amenable number.

10438209 is a deficient number, since it is larger than the sum of its proper divisors (4667427).

10438209 is a wasteful number, since it uses less digits than its factorization.

10438209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176 (or 2173 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 10438209 is about 3230.8217221011. The cubic root of 10438209 is about 218.5455642122.

The spelling of 10438209 in words is "ten million, four hundred thirty-eight thousand, two hundred nine".