728608 has 12 divisors (see below), whose sum is σ = 1434510. Its totient is φ = 364288.

The previous prime is 728579. The next prime is 728627. The reversal of 728608 is 806827.

It can be written as a sum of positive squares in only one way, i.e., 725904 + 2704 = 852^2 + 52^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 728608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11353 + ... + 11416.

2⁷²⁸⁶⁰⁸ is an apocalyptic number.

It is an amenable number.

728608 is a deficient number, since it is larger than the sum of its proper divisors (705902).

728608 is a wasteful number, since it uses less digits than its factorization.

728608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22779 (or 22771 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 728608 is about 853.5853794437. The cubic root of 728608 is about 89.9838654204.

The spelling of 728608 in words is "seven hundred twenty-eight thousand, six hundred eight".