16138144 has 72 divisors (see below), whose sum is σ = 36868608. Its totient is φ = 6894720.

The previous prime is 16138139. The next prime is 16138169. The reversal of 16138144 is 44183161.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127009 + ... + 127135.

It is an arithmetic number, because the mean of its divisors is an integer number (512064).

Almost surely, 2^16138144 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 16138144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18434304).

16138144 is an abundant number, since it is smaller than the sum of its proper divisors (20730464).

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

16138144 is a wasteful number, since it uses less digits than its factorization.

16138144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 159 counting only the distinct ones).

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

The square root of 16138144 is about 4017.2308870664. The cubic root of 16138144 is about 252.7073433334.

The spelling of 16138144 in words is "sixteen million, one hundred thirty-eight thousand, one hundred forty-four".