708728 has 8 divisors (see below), whose sum is σ = 1328880. Its totient is φ = 354360.

The previous prime is 708703. The next prime is 708733. The reversal of 708728 is 827807.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 708694 and 708703.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 708728.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44288 + ... + 44303.

It is an arithmetic number, because the mean of its divisors is an integer number (166110).

2⁷⁰⁸⁷²⁸ is an apocalyptic number.

It is an amenable number.

708728 is a deficient number, since it is larger than the sum of its proper divisors (620152).

708728 is a wasteful number, since it uses less digits than its factorization.

708728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88597 (or 88593 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 708728 is about 841.8598458176. The cubic root of 708728 is about 89.1579067684.

The spelling of 708728 in words is "seven hundred eight thousand, seven hundred twenty-eight".