7128444 has 12 divisors (see below), whose sum is σ = 16633064. Its totient is φ = 2376144.

The previous prime is 7128437. The next prime is 7128463. The reversal of 7128444 is 4448217.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×7128444² = 101629427722272, which contains 22 as substring.

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, 297007 + ... + 297030.

Almost surely, 2^7128444 is an apocalyptic number.

It is an amenable number.

7128444 is an abundant number, since it is smaller than the sum of its proper divisors (9504620).

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

7128444 is a wasteful number, since it uses less digits than its factorization.

7128444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594044 (or 594042 counting only the distinct ones).

The product of its digits is 7168, while the sum is 30.

The square root of 7128444 is about 2669.9146053760. The cubic root of 7128444 is about 192.4560556350.

The spelling of 7128444 in words is "seven million, one hundred twenty-eight thousand, four hundred forty-four".