11209842 has 48 divisors (see below), whose sum is σ = 28416960. Its totient is φ = 3126816.

The previous prime is 11209831. The next prime is 11209843. The reversal of 11209842 is 24890211.

It is not an unprimeable number, because it can be changed into a prime (11209843) 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 23 ways as a sum of consecutive naturals, for example, 4384 + ... + 6452.

It is an arithmetic number, because the mean of its divisors is an integer number (592020).

Almost surely, 2^11209842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11209842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14208480).

11209842 is an abundant number, since it is smaller than the sum of its proper divisors (17207118).

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

11209842 is a wasteful number, since it uses less digits than its factorization.

11209842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127 (or 2124 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 11209842 is about 3348.1102132397. The cubic root of 11209842 is about 223.8033057561.

The spelling of 11209842 in words is "eleven million, two hundred nine thousand, eight hundred forty-two".