11663864 has 8 divisors (see below), whose sum is σ = 21869760. Its totient is φ = 5831928.

The previous prime is 11663863. The next prime is 11663893. The reversal of 11663864 is 46836611.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11663863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 728984 + ... + 728999.

It is an arithmetic number, because the mean of its divisors is an integer number (2733720).

Almost surely, 2^11663864 is an apocalyptic number.

It is an amenable number.

11663864 is a deficient number, since it is larger than the sum of its proper divisors (10205896).

11663864 is a wasteful number, since it uses less digits than its factorization.

11663864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457989 (or 1457985 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 11663864 is about 3415.2399622867. The cubic root of 11663864 is about 226.7849075514.

The spelling of 11663864 in words is "eleven million, six hundred sixty-three thousand, eight hundred sixty-four".