11909568 has 56 divisors (see below), whose sum is σ = 34381440. Its totient is φ = 3608320.

The previous prime is 11909543. The next prime is 11909591. The reversal of 11909568 is 86590911.

11909568 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708 + ... + 4931.

Almost surely, 2^11909568 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 11909568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17190720).

11909568 is an abundant number, since it is smaller than the sum of its proper divisors (22471872).

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

11909568 is a wasteful number, since it uses less digits than its factorization.

11909568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5665 (or 5655 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 11909568 is about 3451.0241958004. The cubic root of 11909568 is about 228.3662933340.

The spelling of 11909568 in words is "eleven million, nine hundred nine thousand, five hundred sixty-eight".