255798 has 20 divisors (see below), whose sum is σ = 573540. Its totient is φ = 85212.

The previous prime is 255767. The next prime is 255803. The reversal of 255798 is 897552.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

255798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 628 + ... + 951.

It is an arithmetic number, because the mean of its divisors is an integer number (28677).

2²⁵⁵⁷⁹⁸ is an apocalyptic number.

255798 is an abundant number, since it is smaller than the sum of its proper divisors (317742).

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

255798 is a wasteful number, since it uses less digits than its factorization.

255798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593 (or 1584 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 255798 is about 505.7647674562. The cubic root of 255798 is about 63.4793369022.

The spelling of 255798 in words is "two hundred fifty-five thousand, seven hundred ninety-eight".