11711838 has 16 divisors (see below), whose sum is σ = 23529600. Its totient is φ = 3886296.

The previous prime is 11711797. The next prime is 11711839. The reversal of 11711838 is 83811711.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11711839) 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, 2938 + ... + 5661.

It is an arithmetic number, because the mean of its divisors is an integer number (1470600).

Almost surely, 2^11711838 is an apocalyptic number.

11711838 is an abundant number, since it is smaller than the sum of its proper divisors (11817762).

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

11711838 is a wasteful number, since it uses less digits than its factorization.

11711838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8831.

The product of its digits is 1344, while the sum is 30.

The square root of 11711838 is about 3422.2562732794. The cubic root of 11711838 is about 227.0954077654.

The spelling of 11711838 in words is "eleven million, seven hundred eleven thousand, eight hundred thirty-eight".