11209838 has 8 divisors (see below), whose sum is σ = 16829688. Its totient is φ = 5599944.

The previous prime is 11209831. The next prime is 11209843. The reversal of 11209838 is 83890211.

11209838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11209831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1820 + ... + 5072.

It is an arithmetic number, because the mean of its divisors is an integer number (2103711).

Almost surely, 2^11209838 is an apocalyptic number.

11209838 is a deficient number, since it is larger than the sum of its proper divisors (5619850).

11209838 is a wasteful number, since it uses less digits than its factorization.

11209838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 11209838 is about 3348.1096158877. The cubic root of 11209838 is about 223.8032791362.

The spelling of 11209838 in words is "eleven million, two hundred nine thousand, eight hundred thirty-eight".