11721768 has 16 divisors (see below), whose sum is σ = 29304480. Its totient is φ = 3907248.

The previous prime is 11721767. The next prime is 11721769. The reversal of 11721768 is 86712711.

It is an interprime number because it is at equal distance from previous prime (11721767) and next prime (11721769).

It is not an unprimeable number, because it can be changed into a prime (11721763) 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 3 ways as a sum of consecutive naturals, for example, 244180 + ... + 244227.

It is an arithmetic number, because the mean of its divisors is an integer number (1831530).

Almost surely, 2^11721768 is an apocalyptic number.

It is an amenable number.

11721768 is an abundant number, since it is smaller than the sum of its proper divisors (17582712).

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

11721768 is a wasteful number, since it uses less digits than its factorization.

11721768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488416 (or 488412 counting only the distinct ones).

The product of its digits is 4704, while the sum is 33.

The square root of 11721768 is about 3423.7067631443. The cubic root of 11721768 is about 227.1595713457.

The spelling of 11721768 in words is "eleven million, seven hundred twenty-one thousand, seven hundred sixty-eight".