730028 has 24 divisors (see below), whose sum is σ = 1399440. Its totient is φ = 331200.

The previous prime is 730021. The next prime is 730033. The reversal of 730028 is 820037.

730028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 729991 and 730009.

It is not an unprimeable number, because it can be changed into a prime (730021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5183 + ... + 5321.

It is an arithmetic number, because the mean of its divisors is an integer number (58310).

2⁷³⁰⁰²⁸ is an apocalyptic number.

It is an amenable number.

730028 is a deficient number, since it is larger than the sum of its proper divisors (669412).

730028 is a wasteful number, since it uses less digits than its factorization.

730028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 730028 is about 854.4167601352. The cubic root of 730028 is about 90.0422846571.

Subtracting 730028 from its reverse (820037), we obtain a palindrome (90009).

The spelling of 730028 in words is "seven hundred thirty thousand, twenty-eight".