728547 has 8 divisors (see below), whose sum is σ = 992256. Its totient is φ = 475272.

The previous prime is 728537. The next prime is 728551. The reversal of 728547 is 745827.

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

It is a de Polignac number, because none of the positive numbers 2^k-728547 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (728527) 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, 2443 + ... + 2724.

It is an arithmetic number, because the mean of its divisors is an integer number (124032).

2⁷²⁸⁵⁴⁷ is an apocalyptic number.

728547 is a deficient number, since it is larger than the sum of its proper divisors (263709).

728547 is a wasteful number, since it uses less digits than its factorization.

728547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5217.

The product of its digits is 15680, while the sum is 33.

The square root of 728547 is about 853.5496470622. The cubic root of 728547 is about 89.9813541620.

It can be divided in two parts, 728 and 547, that added together give a triangular number (1275 = T₅₀).

The spelling of 728547 in words is "seven hundred twenty-eight thousand, five hundred forty-seven".