728908 has 12 divisors (see below), whose sum is σ = 1285200. Its totient is φ = 361712.

The previous prime is 728899. The next prime is 728911. The reversal of 728908 is 809827.

It is a happy number.

It is an unprimeable number.

728908 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (107100).

2⁷²⁸⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

728908 is a deficient number, since it is larger than the sum of its proper divisors (556292).

728908 is a wasteful number, since it uses less digits than its factorization.

728908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376 (or 1374 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 728908 is about 853.7610907040. The cubic root of 728908 is about 89.9962138325.

The spelling of 728908 in words is "seven hundred twenty-eight thousand, nine hundred eight".