728635168 has 24 divisors (see below), whose sum is σ = 1450624140. Its totient is φ = 360222720.

The previous prime is 728635151. The next prime is 728635207. The reversal of 728635168 is 861536827.

It can be written as a sum of positive squares in 2 ways, for example, as 728352144 + 283024 = 26988^2 + 532^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125073 + ... + 130768.

Almost surely, 2^728635168 is an apocalyptic number.

It is an amenable number.

728635168 is a deficient number, since it is larger than the sum of its proper divisors (721988972).

728635168 is a wasteful number, since it uses less digits than its factorization.

728635168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255940 (or 255932 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 728635168 is about 26993.2430063525. The cubic root of 728635168 is about 899.8498383220.

The spelling of 728635168 in words is "seven hundred twenty-eight million, six hundred thirty-five thousand, one hundred sixty-eight".