730528 has 24 divisors (see below), whose sum is σ = 1479492. Its totient is φ = 354816.

The previous prime is 730487. The next prime is 730537. The reversal of 730528 is 825037.

It can be written as a sum of positive squares in 2 ways, for example, as 725904 + 4624 = 852^2 + 68^2 .

It is an unprimeable number.

730528 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 876 + ... + 1492.

2⁷³⁰⁵²⁸ 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 730528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739746).

730528 is an abundant number, since it is smaller than the sum of its proper divisors (748964).

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

730528 is a wasteful number, since it uses less digits than its factorization.

730528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 730528 is about 854.7093073086. The cubic root of 730528 is about 90.0628367764.

The spelling of 730528 in words is "seven hundred thirty thousand, five hundred twenty-eight".