11980056 has 64 divisors (see below), whose sum is σ = 34110720. Its totient is φ = 3470720.

The previous prime is 11980039. The next prime is 11980057. The reversal of 11980056 is 65008911.

11980056 = T₄₈ + T₄₉ + ... + T₄₁₅.

It is a happy number.

11980056 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11980057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5086 + ... + 7058.

It is an arithmetic number, because the mean of its divisors is an integer number (532980).

Almost surely, 2^11980056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11980056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17055360).

11980056 is an abundant number, since it is smaller than the sum of its proper divisors (22130664).

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

11980056 is a wasteful number, since it uses less digits than its factorization.

11980056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016 (or 2012 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 11980056 is about 3461.2217496139. The cubic root of 11980056 is about 228.8159438414.

Adding to 11980056 its reverse (65008911), we get a palindrome (76988967).

The spelling of 11980056 in words is "eleven million, nine hundred eighty thousand, fifty-six".