255930 has 32 divisors (see below), whose sum is σ = 648000. Its totient is φ = 64512.

The previous prime is 255923. The next prime is 255947. The reversal of 255930 is 39552.

It is a self number, because there is not a number n which added to its sum of digits gives 255930.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 255930.

It is an unprimeable number.

255930 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346 + ... + 794.

It is an arithmetic number, because the mean of its divisors is an integer number (20250).

2²⁵⁵⁹³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324000).

255930 is an abundant number, since it is smaller than the sum of its proper divisors (392070).

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

255930 is a wasteful number, since it uses less digits than its factorization.

255930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 255930 is about 505.8952460737. The cubic root of 255930 is about 63.4902541515.

The spelling of 255930 in words is "two hundred fifty-five thousand, nine hundred thirty".