656648 has 16 divisors (see below), whose sum is σ = 1248000. Its totient is φ = 323856.
The previous prime is 656609. The next prime is 656651. The reversal of 656648 is 846656.
It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.
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, 113 + ... + 1151.
It is an arithmetic number, because the mean of its divisors is an integer number (78000).
2656648 is an apocalyptic number.
It is an amenable number.
656648 is a deficient number, since it is larger than the sum of its proper divisors (591352).
656648 is a wasteful number, since it uses less digits than its factorization.
656648 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1124 (or 1120 counting only the distinct ones).
The product of its digits is 34560, while the sum is 35.
The square root of 656648 is about 810.3382010001. The cubic root of 656648 is about 86.9182303002.
The spelling of 656648 in words is "six hundred fifty-six thousand, six hundred forty-eight".
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