11911648 has 48 divisors (see below), whose sum is σ = 27476064. Its totient is φ = 4976640.

The previous prime is 11911639. The next prime is 11911667. The reversal of 11911648 is 84611911.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8536 + ... + 9832.

It is an arithmetic number, because the mean of its divisors is an integer number (572418).

Almost surely, 2^11911648 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 11911648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13738032).

11911648 is an abundant number, since it is smaller than the sum of its proper divisors (15564416).

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

11911648 is a wasteful number, since it uses less digits than its factorization.

11911648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355 (or 1347 counting only the distinct ones).

The product of its digits is 1728, while the sum is 31.

The square root of 11911648 is about 3451.3255424547. The cubic root of 11911648 is about 228.3795872458.

The spelling of 11911648 in words is "eleven million, nine hundred eleven thousand, six hundred forty-eight".