11681424 has 60 divisors (see below), whose sum is σ = 34122816. Its totient is φ = 3723456.

The previous prime is 11681413. The next prime is 11681429. The reversal of 11681424 is 42418611.

It is a happy number.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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 (11681429) 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 11 ways as a sum of consecutive naturals, for example, 1549 + ... + 5075.

Almost surely, 2^11681424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11681424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17061408).

11681424 is an abundant number, since it is smaller than the sum of its proper divisors (22441392).

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

11681424 is a wasteful number, since it uses less digits than its factorization.

11681424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564 (or 3555 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 11681424 is about 3417.8098250195. The cubic root of 11681424 is about 226.8986590540.

The spelling of 11681424 in words is "eleven million, six hundred eighty-one thousand, four hundred twenty-four".