655856 has 20 divisors (see below), whose sum is σ = 1283400. Its totient is φ = 324672.

The previous prime is 655849. The next prime is 655859. The reversal of 655856 is 658556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655859) 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 in 3 ways as a sum of consecutive naturals, for example, 2750 + ... + 2978.

It is an arithmetic number, because the mean of its divisors is an integer number (64170).

2⁶⁵⁵⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

655856 is a deficient number, since it is larger than the sum of its proper divisors (627544).

655856 is a wasteful number, since it uses less digits than its factorization.

655856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 410 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 655856 is about 809.8493687100. The cubic root of 655856 is about 86.8832714723.

The spelling of 655856 in words is "six hundred fifty-five thousand, eight hundred fifty-six".