728611 has 8 divisors (see below), whose sum is σ = 804384. Its totient is φ = 655680.

The previous prime is 728579. The next prime is 728627. The reversal of 728611 is 116827.

728611 is digitally balanced in base 2, 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 not a de Polignac number, because 728611 - 2⁵ = 728579 is a prime.

It is a Duffinian number.

728611 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (728681) 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, 151 + ... + 1216.

It is an arithmetic number, because the mean of its divisors is an integer number (100548).

2⁷²⁸⁶¹¹ is an apocalyptic number.

728611 is a deficient number, since it is larger than the sum of its proper divisors (75773).

728611 is a wasteful number, since it uses less digits than its factorization.

728611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421.

The product of its digits is 672, while the sum is 25.

The square root of 728611 is about 853.5871367353. The cubic root of 728611 is about 89.9839889213.

The spelling of 728611 in words is "seven hundred twenty-eight thousand, six hundred eleven".