11381144 has 16 divisors (see below), whose sum is σ = 21794400. Its totient is φ = 5569312.

The previous prime is 11381119. The next prime is 11381147. The reversal of 11381144 is 44118311.

It is a happy number.

11381144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11381147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14759 + ... + 15510.

It is an arithmetic number, because the mean of its divisors is an integer number (1362150).

Almost surely, 2^11381144 is an apocalyptic number.

It is an amenable number.

11381144 is a deficient number, since it is larger than the sum of its proper divisors (10413256).

11381144 is a wasteful number, since it uses less digits than its factorization.

11381144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30322 (or 30318 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

The square root of 11381144 is about 3373.5951150071. The cubic root of 11381144 is about 224.9375563343.

Adding to 11381144 its reverse (44118311), we get a palindrome (55499455).

The spelling of 11381144 in words is "eleven million, three hundred eighty-one thousand, one hundred forty-four".