11643530 has 16 divisors (see below), whose sum is σ = 21525480. Its totient is φ = 4531392.

The previous prime is 11643509. The next prime is 11643539. The reversal of 11643530 is 3534611.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10936249 + 707281 = 3307^2 + 841^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11643496 and 11643505.

It is not an unprimeable number, because it can be changed into a prime (11643539) 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 7 ways as a sum of consecutive naturals, for example, 15365 + ... + 16104.

Almost surely, 2^11643530 is an apocalyptic number.

11643530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11643530 is a deficient number, since it is larger than the sum of its proper divisors (9881950).

11643530 is a wasteful number, since it uses less digits than its factorization.

11643530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31513.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 11643530 is about 3412.2617132922. The cubic root of 11643530 is about 226.6530436834.

The spelling of 11643530 in words is "eleven million, six hundred forty-three thousand, five hundred thirty".