11209940 has 24 divisors (see below), whose sum is σ = 26904192. Its totient is φ = 3843360.

The previous prime is 11209907. The next prime is 11209951. The reversal of 11209940 is 4990211.

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, 39896 + ... + 40175.

It is an arithmetic number, because the mean of its divisors is an integer number (1121008).

Almost surely, 2^11209940 is an apocalyptic number.

11209940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11209940 is an abundant number, since it is smaller than the sum of its proper divisors (15694252).

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

11209940 is a wasteful number, since it uses less digits than its factorization.

11209940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80087 (or 80085 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 11209940 is about 3348.1248483293. The cubic root of 11209940 is about 223.8039579407.

The spelling of 11209940 in words is "eleven million, two hundred nine thousand, nine hundred forty".