728216493 has 8 divisors (see below), whose sum is σ = 975557856. Its totient is φ = 483176400.

The previous prime is 728216483. The next prime is 728216497. The reversal of 728216493 is 394612827.

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

It is not a de Polignac number, because 728216493 - 2¹⁶ = 728150957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728216497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 574578 + ... + 575843.

It is an arithmetic number, because the mean of its divisors is an integer number (121944732).

Almost surely, 2^728216493 is an apocalyptic number.

It is an amenable number.

728216493 is a deficient number, since it is larger than the sum of its proper divisors (247341363).

728216493 is a wasteful number, since it uses less digits than its factorization.

728216493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150635.

The product of its digits is 145152, while the sum is 42.

The square root of 728216493 is about 26985.4867104523. The cubic root of 728216493 is about 899.6774535538.

The spelling of 728216493 in words is "seven hundred twenty-eight million, two hundred sixteen thousand, four hundred ninety-three".