728570 has 16 divisors (see below), whose sum is σ = 1344168. Its totient is φ = 284160.

The previous prime is 728561. The next prime is 728573. The reversal of 728570 is 75827.

It can be written as a sum of positive squares in 4 ways, for example, as 395641 + 332929 = 629^2 + 577^2 .

It is not an unprimeable number, because it can be changed into a prime (728573) 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 7 ways as a sum of consecutive naturals, for example, 479 + ... + 1298.

2⁷²⁸⁵⁷⁰ is an apocalyptic number.

728570 is a deficient number, since it is larger than the sum of its proper divisors (615598).

728570 is a wasteful number, since it uses less digits than its factorization.

728570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 728570 is about 853.5631201030. The cubic root of 728570 is about 89.9823010464.

The spelling of 728570 in words is "seven hundred twenty-eight thousand, five hundred seventy".