11820156 has 12 divisors (see below), whose sum is σ = 27580392. Its totient is φ = 3940048.

The previous prime is 11820121. The next prime is 11820161. The reversal of 11820156 is 65102811.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492495 + ... + 492518.

It is an arithmetic number, because the mean of its divisors is an integer number (2298366).

Almost surely, 2^11820156 is an apocalyptic number.

It is an amenable number.

11820156 is an abundant number, since it is smaller than the sum of its proper divisors (15760236).

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

11820156 is a wasteful number, since it uses less digits than its factorization.

11820156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985020 (or 985018 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 11820156 is about 3438.0453749187. The cubic root of 11820156 is about 227.7933646460.

Adding to 11820156 its reverse (65102811), we get a palindrome (76922967).

The spelling of 11820156 in words is "eleven million, eight hundred twenty thousand, one hundred fifty-six".