728011 has 4 divisors (see below), whose sum is σ = 734800. Its totient is φ = 721224.

The previous prime is 728003. The next prime is 728017. The reversal of 728011 is 110827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 728011 - 2³ = 728003 is a prime.

It is a super-2 number, since 2×728011² = 1060000032242, which contains 22 as substring.

It is a Duffinian number.

728011 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 728011.

It is not an unprimeable number, because it can be changed into a prime (728017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3231 + ... + 3448.

It is an arithmetic number, because the mean of its divisors is an integer number (183700).

2⁷²⁸⁰¹¹ is an apocalyptic number.

728011 is a deficient number, since it is larger than the sum of its proper divisors (6789).

728011 is a wasteful number, since it uses less digits than its factorization.

728011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6788.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 728011 is about 853.2356063831. The cubic root of 728011 is about 89.9592819926.

Adding to 728011 its reverse (110827), we get a palindrome (838838).

The spelling of 728011 in words is "seven hundred twenty-eight thousand, eleven".