655984 has 20 divisors (see below), whose sum is σ = 1452784. Its totient is φ = 281088.

The previous prime is 655961. The next prime is 655987. The reversal of 655984 is 489556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2817 + ... + 3040.

2⁶⁵⁵⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

655984 is an abundant number, since it is smaller than the sum of its proper divisors (796800).

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

655984 is a wasteful number, since it uses less digits than its factorization.

655984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5872 (or 5866 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 655984 is about 809.9283918965. The cubic root of 655984 is about 86.8889232899. Note that the first 3 decimals are identical.

The spelling of 655984 in words is "six hundred fifty-five thousand, nine hundred eighty-four".