11681444 has 6 divisors (see below), whose sum is σ = 20442534. Its totient is φ = 5840720.

The previous prime is 11681443. The next prime is 11681459. The reversal of 11681444 is 44418611.

11681444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9241600 + 2439844 = 3040^2 + 1562^2 .

It is a super-2 number, since 2×11681444² = 272912267850272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11681443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460177 + ... + 1460184.

It is an arithmetic number, because the mean of its divisors is an integer number (3407089).

Almost surely, 2^11681444 is an apocalyptic number.

It is an amenable number.

11681444 is a deficient number, since it is larger than the sum of its proper divisors (8761090).

11681444 is a wasteful number, since it uses less digits than its factorization.

11681444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920365 (or 2920363 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 11681444 is about 3417.8127508686. The cubic root of 11681444 is about 226.8987885465.

The spelling of 11681444 in words is "eleven million, six hundred eighty-one thousand, four hundred forty-four".