647708 has 12 divisors (see below), whose sum is σ = 1140720. Its totient is φ = 321792.

The previous prime is 647693. The next prime is 647719. The reversal of 647708 is 807746.

It is a congruent number.

It is an unprimeable number.

647708 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353 + ... + 1191.

It is an arithmetic number, because the mean of its divisors is an integer number (95060).

2⁶⁴⁷⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

647708 is a deficient number, since it is larger than the sum of its proper divisors (493012).

647708 is a wasteful number, since it uses less digits than its factorization.

647708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 647708 is about 804.8030815050. The cubic root of 647708 is about 86.5219742139.

The spelling of 647708 in words is "six hundred forty-seven thousand, seven hundred eight".