7128430 has 8 divisors (see below), whose sum is σ = 12831192. Its totient is φ = 2851368.

The previous prime is 7128427. The next prime is 7128437. The reversal of 7128430 is 348217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 7128395 and 7128404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7128437) by changing a digit.

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, 356412 + ... + 356431.

It is an arithmetic number, because the mean of its divisors is an integer number (1603899).

Almost surely, 2^7128430 is an apocalyptic number.

7128430 is a deficient number, since it is larger than the sum of its proper divisors (5702762).

7128430 is a wasteful number, since it uses less digits than its factorization.

7128430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712850.

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

The square root of 7128430 is about 2669.9119835680. The cubic root of 7128430 is about 192.4559296427.

The spelling of 7128430 in words is "seven million, one hundred twenty-eight thousand, four hundred thirty".