7230728643 has 8 divisors (see below), whose sum is σ = 10208087568. Its totient is φ = 4536927744.

The previous prime is 7230728639. The next prime is 7230728651. The reversal of 7230728643 is 3468270327.

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

It is not a de Polignac number, because 7230728643 - 2² = 7230728639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7230728595 and 7230728604.

It is not an unprimeable number, because it can be changed into a prime (7230728623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70889446 + ... + 70889547.

It is an arithmetic number, because the mean of its divisors is an integer number (1276010946).

Almost surely, 2^7230728643 is an apocalyptic number.

7230728643 is a deficient number, since it is larger than the sum of its proper divisors (2977358925).

7230728643 is a wasteful number, since it uses less digits than its factorization.

7230728643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141779013.

The product of its (nonzero) digits is 338688, while the sum is 42.

The square root of 7230728643 is about 85033.6912229500. The cubic root of 7230728643 is about 1933.7219240071.

The spelling of 7230728643 in words is "seven billion, two hundred thirty million, seven hundred twenty-eight thousand, six hundred forty-three".