728216357 has 6 divisors (see below), whose sum is σ = 800436294. Its totient is φ = 662014760.

The previous prime is 728216347. The next prime is 728216371. The reversal of 728216357 is 753612827.

It can be written as a sum of positive squares in only one way, i.e., 508998721 + 219217636 = 22561^2 + 14806^2 .

It is not a de Polignac number, because 728216357 - 2²² = 724022053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728216347) 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 5 ways as a sum of consecutive naturals, for example, 3009038 + ... + 3009279.

It is an arithmetic number, because the mean of its divisors is an integer number (133406049).

Almost surely, 2^728216357 is an apocalyptic number.

It is an amenable number.

728216357 is a deficient number, since it is larger than the sum of its proper divisors (72219937).

728216357 is a wasteful number, since it uses less digits than its factorization.

728216357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6018339 (or 6018328 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 728216357 is about 26985.4841905792. The cubic root of 728216357 is about 899.6773975466.

The spelling of 728216357 in words is "seven hundred twenty-eight million, two hundred sixteen thousand, three hundred fifty-seven".