655688 has 16 divisors (see below), whose sum is σ = 1341360. Its totient is φ = 298000.

The previous prime is 655687. The next prime is 655693. The reversal of 655688 is 886556.

It is not an unprimeable number, because it can be changed into a prime (655687) by changing a digit.

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, 3638 + ... + 3813.

It is an arithmetic number, because the mean of its divisors is an integer number (83835).

2⁶⁵⁵⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

655688 is an abundant number, since it is smaller than the sum of its proper divisors (685672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

655688 is a wasteful number, since it uses less digits than its factorization.

655688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7468 (or 7464 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 655688 is about 809.7456390744. The cubic root of 655688 is about 86.8758523457.

The spelling of 655688 in words is "six hundred fifty-five thousand, six hundred eighty-eight".