728864336 has 40 divisors (see below), whose sum is σ = 1427962920. Its totient is φ = 360382464.

The previous prime is 728864329. The next prime is 728864363. The reversal of 728864336 is 633468827.

It can be written as a sum of positive squares in 4 ways, for example, as 96040000 + 632824336 = 9800^2 + 25156^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645020 + ... + 646148.

It is an arithmetic number, because the mean of its divisors is an integer number (35699073).

Almost surely, 2^728864336 is an apocalyptic number.

It is an amenable number.

728864336 is a deficient number, since it is larger than the sum of its proper divisors (699098584).

728864336 is a wasteful number, since it uses less digits than its factorization.

728864336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551 (or 1545 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 47.

The square root of 728864336 is about 26997.4875868107. The cubic root of 728864336 is about 899.9441677299.

The spelling of 728864336 in words is "seven hundred twenty-eight million, eight hundred sixty-four thousand, three hundred thirty-six".