728633684 has 12 divisors (see below), whose sum is σ = 1275719508. Its totient is φ = 364142400.

The previous prime is 728633683. The next prime is 728633687. The reversal of 728633684 is 486336827.

It can be written as a sum of positive squares in 2 ways, for example, as 706071184 + 22562500 = 26572^2 + 4750^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728633683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33977 + ... + 51104.

It is an arithmetic number, because the mean of its divisors is an integer number (106309959).

Almost surely, 2^728633684 is an apocalyptic number.

It is an amenable number.

728633684 is a deficient number, since it is larger than the sum of its proper divisors (547085824).

728633684 is a wasteful number, since it uses less digits than its factorization.

728633684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87226 (or 87224 counting only the distinct ones).

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

The square root of 728633684 is about 26993.2155179778. The cubic root of 728633684 is about 899.8492274181.

The spelling of 728633684 in words is "seven hundred twenty-eight million, six hundred thirty-three thousand, six hundred eighty-four".