656464 has 20 divisors (see below), whose sum is σ = 1288980. Its totient is φ = 323840.

The previous prime is 656459. The next prime is 656471. The reversal of 656464 is 464656.

It can be written as a sum of positive squares in 2 ways, for example, as 166464 + 490000 = 408^2 + 700^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194 + ... + 1654.

It is an arithmetic number, because the mean of its divisors is an integer number (64449).

2⁶⁵⁶⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

656464 is a deficient number, since it is larger than the sum of its proper divisors (632516).

656464 is a wasteful number, since it uses less digits than its factorization.

656464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 552 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 656464 is about 810.2246602023. The cubic root of 656464 is about 86.9101110601.

The spelling of 656464 in words is "six hundred fifty-six thousand, four hundred sixty-four".