656804 has 6 divisors (see below), whose sum is σ = 1149414. Its totient is φ = 328400.

The previous prime is 656791. The next prime is 656809. The reversal of 656804 is 408656.

It can be written as a sum of positive squares in only one way, i.e., 532900 + 123904 = 730^2 + 352^2 .

It is not an unprimeable number, because it can be changed into a prime (656809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82097 + ... + 82104.

It is an arithmetic number, because the mean of its divisors is an integer number (191569).

2⁶⁵⁶⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

656804 is a deficient number, since it is larger than the sum of its proper divisors (492610).

656804 is a wasteful number, since it uses less digits than its factorization.

656804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164205 (or 164203 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 656804 is about 810.4344513901. The cubic root of 656804 is about 86.9251128158.

The spelling of 656804 in words is "six hundred fifty-six thousand, eight hundred four".