655584 has 24 divisors (see below), whose sum is σ = 1721160. Its totient is φ = 218496.

The previous prime is 655583. The next prime is 655597. The reversal of 655584 is 485556.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655583) 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, 3319 + ... + 3510.

It is an arithmetic number, because the mean of its divisors is an integer number (71715).

655584 is a Friedman number, since it can be written as (56+8^5*5)*4, using all its digits and the basic arithmetic operations.

2⁶⁵⁵⁵⁸⁴ is an apocalyptic number.

It is an amenable number.

655584 is an abundant number, since it is smaller than the sum of its proper divisors (1065576).

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

655584 is a wasteful number, since it uses less digits than its factorization.

655584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6842 (or 6834 counting only the distinct ones).

The product of its digits is 24000, while the sum is 33.

The square root of 655584 is about 809.6814188309. The cubic root of 655584 is about 86.8712589180.

The spelling of 655584 in words is "six hundred fifty-five thousand, five hundred eighty-four".