728514081 has 15 divisors (see below), whose sum is σ = 1088637121. Its totient is φ = 485514108.

The previous prime is 728514071. The next prime is 728514091. The reversal of 728514081 is 180415827.

The square root of 728514081 is 26991.

It is a perfect power (a square), and thus also a powerful number.

728514081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (728514071) and next prime (728514091).

It is not a de Polignac number, because 728514081 - 2⁵ = 728514049 is a prime.

It is a super-2 number, since 2×728514081² = 1061465532430549122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728514071) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 241420 + ... + 244418.

Almost surely, 2^728514081 is an apocalyptic number.

728514081 is the 26991-st square number.

728514081 is the 13496-th centered octagonal number.

It is an amenable number.

728514081 is a deficient number, since it is larger than the sum of its proper divisors (360123040).

728514081 is an frugal number, since it uses more digits than its factorization.

728514081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010 (or 3002 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The cubic root of 728514081 is about 899.7999888872.

Multiplying 728514081 by its sum of digits (36), we get a square (26226506916 = 161946²).

The spelling of 728514081 in words is "seven hundred twenty-eight million, five hundred fourteen thousand, eighty-one".