11643012 has 36 divisors (see below), whose sum is σ = 30229836. Its totient is φ = 3775680.

The previous prime is 11642959. The next prime is 11643041. The reversal of 11643012 is 21034611.

It is a happy number.

11643012 is a `hidden beast` number, since 11 + 643 + 0 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6471936 + 5171076 = 2544^2 + 2274^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-5 number, since 5×11643012⁵ (a number of 37 digits) contains 55555 as substring. Note that it is a super-d number also for d = 3.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3039 + ... + 5702.

Almost surely, 2^11643012 is an apocalyptic number.

11643012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11643012 is an abundant number, since it is smaller than the sum of its proper divisors (18586824).

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

11643012 is a wasteful number, since it uses less digits than its factorization.

11643012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8788 (or 8783 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 11643012 is about 3412.1858097120. The cubic root of 11643012 is about 226.6496825029.

Adding to 11643012 its reverse (21034611), we get a palindrome (32677623).

The spelling of 11643012 in words is "eleven million, six hundred forty-three thousand, twelve".