11911056 has 40 divisors (see below), whose sum is σ = 32111040. Its totient is φ = 3797376.

The previous prime is 11911027. The next prime is 11911057. The reversal of 11911056 is 65011911.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11911057) 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, 4291 + ... + 6498.

It is an arithmetic number, because the mean of its divisors is an integer number (802776).

Almost surely, 2^11911056 is an apocalyptic number.

11911056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11911056 is an abundant number, since it is smaller than the sum of its proper divisors (20199984).

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

11911056 is a wasteful number, since it uses less digits than its factorization.

11911056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10823 (or 10817 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 24.

The square root of 11911056 is about 3451.2397772395. The cubic root of 11911056 is about 228.3758037515.

Adding to 11911056 its reverse (65011911), we get a palindrome (76922967).

It can be divided in two parts, 119 and 11056, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 11911056 in words is "eleven million, nine hundred eleven thousand, fifty-six".