728571 has 8 divisors (see below), whose sum is σ = 1013760. Its totient is φ = 464552.

The previous prime is 728561. The next prime is 728573. The reversal of 728571 is 175827.

It is a happy number.

728571 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728571 is a prime.

728571 is strictly pandigital in base 7.

It is not an unprimeable number, because it can be changed into a prime (728573) 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, 5211 + ... + 5348.

It is an arithmetic number, because the mean of its divisors is an integer number (126720).

2⁷²⁸⁵⁷¹ is an apocalyptic number.

728571 is a deficient number, since it is larger than the sum of its proper divisors (285189).

728571 is a wasteful number, since it uses less digits than its factorization.

728571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10585.

The product of its digits is 3920, while the sum is 30.

The square root of 728571 is about 853.5637058826. The cubic root of 728571 is about 89.9823422148.

The spelling of 728571 in words is "seven hundred twenty-eight thousand, five hundred seventy-one".