11881056 has 48 divisors (see below), whose sum is σ = 34026048. Its totient is φ = 3600000.

The previous prime is 11881049. The next prime is 11881057. The reversal of 11881056 is 65018811.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11881057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4570 + ... + 6681.

It is an arithmetic number, because the mean of its divisors is an integer number (708876).

Almost surely, 2^11881056 is an apocalyptic number.

11881056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11881056 is an abundant number, since it is smaller than the sum of its proper divisors (22144992).

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

11881056 is a wasteful number, since it uses less digits than its factorization.

11881056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11275 (or 11267 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 11881056 is about 3446.8907728560. The cubic root of 11881056 is about 228.1839082497.

Adding to 11881056 its reverse (65018811), we get a palindrome (76899867).

It can be divided in two parts, 1188105 and 6, that added together give a triangular number (1188111 = T₁₅₄₁).

The spelling of 11881056 in words is "eleven million, eight hundred eighty-one thousand, fifty-six".