11443681 has 8 divisors (see below), whose sum is σ = 12435200. Its totient is φ = 10491120.

The previous prime is 11443637. The next prime is 11443697. The reversal of 11443681 is 18634411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11443681 - 2⁹ = 11443169 is a prime.

It is a super-2 number, since 2×11443681² = 261915669659522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11443631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9126 + ... + 10303.

It is an arithmetic number, because the mean of its divisors is an integer number (1554400).

Almost surely, 2^11443681 is an apocalyptic number.

It is an amenable number.

11443681 is a deficient number, since it is larger than the sum of its proper divisors (991519).

11443681 is a wasteful number, since it uses less digits than its factorization.

11443681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19479.

The product of its digits is 2304, while the sum is 28.

The square root of 11443681 is about 3382.8510165244. The cubic root of 11443681 is about 225.3487989241.

The spelling of 11443681 in words is "eleven million, four hundred forty-three thousand, six hundred eighty-one".