255890 has 8 divisors (see below), whose sum is σ = 460620. Its totient is φ = 102352.

The previous prime is 255887. The next prime is 255907. The reversal of 255890 is 98552.

It can be written as a sum of positive squares in 2 ways, for example, as 249001 + 6889 = 499^2 + 83^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 12785 + ... + 12804.

2²⁵⁵⁸⁹⁰ is an apocalyptic number.

255890 is a deficient number, since it is larger than the sum of its proper divisors (204730).

255890 is a wasteful number, since it uses less digits than its factorization.

255890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25596.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 255890 is about 505.8557106528. The cubic root of 255890 is about 63.4869462906.

The spelling of 255890 in words is "two hundred fifty-five thousand, eight hundred ninety".