255630 has 16 divisors (see below), whose sum is σ = 613584. Its totient is φ = 68160.

The previous prime is 255617. The next prime is 255637. The reversal of 255630 is 36552.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 255597 and 255606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255637) by changing a digit.

255630 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4231 + ... + 4290.

It is an arithmetic number, because the mean of its divisors is an integer number (38349).

2²⁵⁵⁶³⁰ is an apocalyptic number.

255630 is an abundant number, since it is smaller than the sum of its proper divisors (357954).

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

255630 is a wasteful number, since it uses less digits than its factorization.

255630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8531.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 255630 is about 505.5986550615. The cubic root of 255630 is about 63.4654367881.

The spelling of 255630 in words is "two hundred fifty-five thousand, six hundred thirty".