11809900 has 36 divisors (see below), whose sum is σ = 27138888. Its totient is φ = 4445440.

The previous prime is 11809871. The next prime is 11809913. The reversal of 11809900 is 990811.

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 11 ways as a sum of consecutive naturals, for example, 1774 + ... + 5173.

It is an arithmetic number, because the mean of its divisors is an integer number (753858).

Almost surely, 2^11809900 is an apocalyptic number.

11809900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11809900 is an abundant number, since it is smaller than the sum of its proper divisors (15328988).

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

11809900 is a wasteful number, since it uses less digits than its factorization.

11809900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978 (or 6971 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 11809900 is about 3436.5535060581. The cubic root of 11809900 is about 227.7274623919.

The spelling of 11809900 in words is "eleven million, eight hundred nine thousand, nine hundred".