11821688 has 8 divisors (see below), whose sum is σ = 22165680. Its totient is φ = 5910840.

The previous prime is 11821679. The next prime is 11821699. The reversal of 11821688 is 88612811.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 738848 + ... + 738863.

It is an arithmetic number, because the mean of its divisors is an integer number (2770710).

Almost surely, 2^11821688 is an apocalyptic number.

It is an amenable number.

11821688 is a deficient number, since it is larger than the sum of its proper divisors (10343992).

11821688 is a wasteful number, since it uses less digits than its factorization.

11821688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477717 (or 1477713 counting only the distinct ones).

The product of its digits is 6144, while the sum is 35.

The square root of 11821688 is about 3438.2681687152. The cubic root of 11821688 is about 227.8032055866.

The spelling of 11821688 in words is "eleven million, eight hundred twenty-one thousand, six hundred eighty-eight".