11838609 has 8 divisors (see below), whose sum is σ = 17538720. Its totient is φ = 7892388.

The previous prime is 11838571. The next prime is 11838637. The reversal of 11838609 is 90683811.

11838609 is a `hidden beast` number, since 1 + 18 + 38 + 609 = 666.

It is not a de Polignac number, because 11838609 - 2⁷ = 11838481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11838649) 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, 219207 + ... + 219260.

It is an arithmetic number, because the mean of its divisors is an integer number (2192340).

Almost surely, 2^11838609 is an apocalyptic number.

It is an amenable number.

11838609 is a deficient number, since it is larger than the sum of its proper divisors (5700111).

11838609 is an equidigital number, since it uses as much as digits as its factorization.

11838609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438476 (or 438470 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 11838609 is about 3440.7279752983. The cubic root of 11838609 is about 227.9118426492.

The spelling of 11838609 in words is "eleven million, eight hundred thirty-eight thousand, six hundred nine".