655644 has 24 divisors (see below), whose sum is σ = 1669248. Its totient is φ = 198640.

The previous prime is 655643. The next prime is 655649. The reversal of 655644 is 446556.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 655644.

It is not an unprimeable number, because it can be changed into a prime (655643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2352 + ... + 2615.

It is an arithmetic number, because the mean of its divisors is an integer number (69552).

2⁶⁵⁵⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

655644 is an abundant number, since it is smaller than the sum of its proper divisors (1013604).

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

655644 is a wasteful number, since it uses less digits than its factorization.

655644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985 (or 4983 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 655644 is about 809.7184695930. The cubic root of 655644 is about 86.8739090317.

The spelling of 655644 in words is "six hundred fifty-five thousand, six hundred forty-four".