7230728 has 8 divisors (see below), whose sum is σ = 13557630. Its totient is φ = 3615360.

The previous prime is 7230709. The next prime is 7230731. The reversal of 7230728 is 8270327.

It can be written as a sum of positive squares in only one way, i.e., 4401604 + 2829124 = 2098^2 + 1682^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 7230728.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451913 + ... + 451928.

Almost surely, 2^7230728 is an apocalyptic number.

It is an amenable number.

7230728 is a deficient number, since it is larger than the sum of its proper divisors (6326902).

7230728 is a wasteful number, since it uses less digits than its factorization.

7230728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903847 (or 903843 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 7230728 is about 2689.0013015988. The cubic root of 7230728 is about 193.3721866688.

The spelling of 7230728 in words is "seven million, two hundred thirty thousand, seven hundred twenty-eight".