11781906 has 16 divisors (see below), whose sum is σ = 23950848. Its totient is φ = 3862800.

The previous prime is 11781899. The next prime is 11781907. The reversal of 11781906 is 60918711.

11781906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11781907) 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, 15730 + ... + 16461.

It is an arithmetic number, because the mean of its divisors is an integer number (1496928).

Almost surely, 2^11781906 is an apocalyptic number.

11781906 is an abundant number, since it is smaller than the sum of its proper divisors (12168942).

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

11781906 is a wasteful number, since it uses less digits than its factorization.

11781906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32257.

The product of its (nonzero) digits is 3024, while the sum is 33.

The square root of 11781906 is about 3432.4781135500. The cubic root of 11781906 is about 227.5473861764.

The spelling of 11781906 in words is "eleven million, seven hundred eighty-one thousand, nine hundred six".