728057 has 8 divisors (see below), whose sum is σ = 802272. Its totient is φ = 660660.

The previous prime is 728047. The next prime is 728069. The reversal of 728057 is 750827.

It is a de Polignac number, because none of the positive numbers 2^k-728057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728017) 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, 1058 + ... + 1604.

It is an arithmetic number, because the mean of its divisors is an integer number (100284).

2⁷²⁸⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

728057 is a deficient number, since it is larger than the sum of its proper divisors (74215).

728057 is an equidigital number, since it uses as much as digits as its factorization.

728057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 558 counting only the distinct ones).

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

The square root of 728057 is about 853.2625621695. The cubic root of 728057 is about 89.9611766708.

It can be divided in two parts, 7280 and 57, that added together give a palindrome (7337).

The spelling of 728057 in words is "seven hundred twenty-eight thousand, fifty-seven".