11209806 has 16 divisors (see below), whose sum is σ = 24910800. Its totient is φ = 3736584.

The previous prime is 11209777. The next prime is 11209811. The reversal of 11209806 is 60890211.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 11209806.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 103741 + ... + 103848.

It is an arithmetic number, because the mean of its divisors is an integer number (1556925).

Almost surely, 2^11209806 is an apocalyptic number.

11209806 is an abundant number, since it is smaller than the sum of its proper divisors (13700994).

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

11209806 is a wasteful number, since it uses less digits than its factorization.

11209806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207600 (or 207594 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 11209806 is about 3348.1048370683. The cubic root of 11209806 is about 223.8030661771.

The spelling of 11209806 in words is "eleven million, two hundred nine thousand, eight hundred six".