11539968 has 80 divisors (see below), whose sum is σ = 33587136. Its totient is φ = 3491840.

The previous prime is 11539963. The next prime is 11539981. The reversal of 11539968 is 86993511.

It is a super-2 number, since 2×11539968² = 266341722882048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11539961) 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, 16555 + ... + 17237.

Almost surely, 2^11539968 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 11539968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16793568).

11539968 is an abundant number, since it is smaller than the sum of its proper divisors (22047168).

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

11539968 is an equidigital number, since it uses as much as digits as its factorization.

11539968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715 (or 699 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 11539968 is about 3397.0528403309. The cubic root of 11539968 is about 225.9790619389.

The spelling of 11539968 in words is "eleven million, five hundred thirty-nine thousand, nine hundred sixty-eight".