11705988 has 96 divisors (see below), whose sum is σ = 33417216. Its totient is φ = 3117312.

The previous prime is 11705987. The next prime is 11706017. The reversal of 11705988 is 88950711.

It is a super-2 number, since 2×11705988² = 274060310112288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11705987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140995 + ... + 141077.

It is an arithmetic number, because the mean of its divisors is an integer number (348096).

Almost surely, 2^11705988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11705988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16708608).

11705988 is an abundant number, since it is smaller than the sum of its proper divisors (21711228).

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

11705988 is a wasteful number, since it uses less digits than its factorization.

11705988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 11705988 is about 3421.4014672353. The cubic root of 11705988 is about 227.0575904905.

The spelling of 11705988 in words is "eleven million, seven hundred five thousand, nine hundred eighty-eight".