255940 has 24 divisors (see below), whose sum is σ = 548352. Its totient is φ = 100320.

The previous prime is 255923. The next prime is 255947. The reversal of 255940 is 49552.

It is not an unprimeable number, because it can be changed into a prime (255947) by changing a digit.

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, 1245 + ... + 1435.

It is an arithmetic number, because the mean of its divisors is an integer number (22848).

2²⁵⁵⁹⁴⁰ is an apocalyptic number.

255940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255940 is an abundant number, since it is smaller than the sum of its proper divisors (292412).

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

255940 is a wasteful number, since it uses less digits than its factorization.

255940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 255940 is about 505.9051294462. The cubic root of 255940 is about 63.4910810628.

The spelling of 255940 in words is "two hundred fifty-five thousand, nine hundred forty".