7128144 has 60 divisors (see below), whose sum is σ = 20311200. Its totient is φ = 2332992.

The previous prime is 7128139. The next prime is 7128167. The reversal of 7128144 is 4418217.

It is a congruent number.

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, 8077 + ... + 8915.

It is an arithmetic number, because the mean of its divisors is an integer number (338520).

Almost surely, 2^7128144 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 7128144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10155600).

7128144 is an abundant number, since it is smaller than the sum of its proper divisors (13183056).

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

7128144 is a wasteful number, since it uses less digits than its factorization.

7128144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912 (or 903 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 7128144 is about 2669.8584232127. The cubic root of 7128144 is about 192.4533557645.

The spelling of 7128144 in words is "seven million, one hundred twenty-eight thousand, one hundred forty-four".