9138144 has 24 divisors (see below), whose sum is σ = 23987880. Its totient is φ = 3046016.

The previous prime is 9138139. The next prime is 9138169. The reversal of 9138144 is 4418319.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47499 + ... + 47690.

It is an arithmetic number, because the mean of its divisors is an integer number (999495).

Almost surely, 2^9138144 is an apocalyptic number.

It is an amenable number.

9138144 is an abundant number, since it is smaller than the sum of its proper divisors (14849736).

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

9138144 is a wasteful number, since it uses less digits than its factorization.

9138144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95202 (or 95194 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 9138144 is about 3022.9363208642. The cubic root of 9138144 is about 209.0672463570.

The spelling of 9138144 in words is "nine million, one hundred thirty-eight thousand, one hundred forty-four".