728441 has 8 divisors (see below), whose sum is σ = 876480. Its totient is φ = 591408.

The previous prime is 728437. The next prime is 728471. The reversal of 728441 is 144827.

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

It is a cyclic number.

It is not a de Polignac number, because 728441 - 2² = 728437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 728441.

It is not an unprimeable number, because it can be changed into a prime (728471) 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, 2606 + ... + 2871.

It is an arithmetic number, because the mean of its divisors is an integer number (109560).

2⁷²⁸⁴⁴¹ is an apocalyptic number.

It is an amenable number.

728441 is a deficient number, since it is larger than the sum of its proper divisors (148039).

728441 is a wasteful number, since it uses less digits than its factorization.

728441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5503.

The product of its digits is 1792, while the sum is 26.

The square root of 728441 is about 853.4875511687. The cubic root of 728441 is about 89.9769900024.

The spelling of 728441 in words is "seven hundred twenty-eight thousand, four hundred forty-one".