7128304 has 40 divisors (see below), whose sum is σ = 14865120. Its totient is φ = 3299328.

The previous prime is 7128293. The next prime is 7128307. The reversal of 7128304 is 4038217.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7128307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19677 + ... + 20035.

It is an arithmetic number, because the mean of its divisors is an integer number (371628).

Almost surely, 2^7128304 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 7128304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7432560).

7128304 is an abundant number, since it is smaller than the sum of its proper divisors (7736816).

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

7128304 is a wasteful number, since it uses less digits than its factorization.

7128304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 7128304 is about 2669.8883871803. Note that the first 3 decimals coincide. The cubic root of 7128304 is about 192.4547957048.

The spelling of 7128304 in words is "seven million, one hundred twenty-eight thousand, three hundred four".