11643864 has 16 divisors (see below), whose sum is σ = 29109720. Its totient is φ = 3881280.

The previous prime is 11643857. The next prime is 11643869. The reversal of 11643864 is 46834611.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11643869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242557 + ... + 242604.

Almost surely, 2^11643864 is an apocalyptic number.

It is an amenable number.

11643864 is an abundant number, since it is smaller than the sum of its proper divisors (17465856).

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

11643864 is a wasteful number, since it uses less digits than its factorization.

11643864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485170 (or 485166 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 11643864 is about 3412.3106540876. The cubic root of 11643864 is about 226.6552108782.

The spelling of 11643864 in words is "eleven million, six hundred forty-three thousand, eight hundred sixty-four".