11781936 has 50 divisors (see below), whose sum is σ = 34104092. Its totient is φ = 3926880.

The previous prime is 11781907. The next prime is 11781937. The reversal of 11781936 is 63918711.

11781936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 11781936.

It is not an unprimeable number, because it can be changed into a prime (11781937) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3250 + ... + 5841.

Almost surely, 2^11781936 is an apocalyptic number.

11781936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11781936 is an abundant number, since it is smaller than the sum of its proper divisors (22322156).

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

11781936 is an equidigital number, since it uses as much as digits as its factorization.

11781936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9111 (or 9096 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 11781936 is about 3432.4824835678. The cubic root of 11781936 is about 227.5475793091.

It can be divided in two parts, 117819 and 36, that added together give a triangular number (117855 = T₄₈₅).

The spelling of 11781936 in words is "eleven million, seven hundred eighty-one thousand, nine hundred thirty-six".