728266571 has 4 divisors (see below), whose sum is σ = 728417592. Its totient is φ = 728115552.

The previous prime is 728266541. The next prime is 728266577. The reversal of 728266571 is 175662827.

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 728266571 - 2¹⁸ = 728004427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728266577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68030 + ... + 78003.

It is an arithmetic number, because the mean of its divisors is an integer number (182104398).

Almost surely, 2^728266571 is an apocalyptic number.

728266571 is a deficient number, since it is larger than the sum of its proper divisors (151021).

728266571 is a wasteful number, since it uses less digits than its factorization.

728266571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151020.

The product of its digits is 282240, while the sum is 44.

The square root of 728266571 is about 26986.4145636281. The cubic root of 728266571 is about 899.6980760909.

It can be divided in two parts, 72826 and 6571, that added together give a palindrome (79397).

The spelling of 728266571 in words is "seven hundred twenty-eight million, two hundred sixty-six thousand, five hundred seventy-one".