255390 has 16 divisors (see below), whose sum is σ = 613008. Its totient is φ = 68096.

The previous prime is 255383. The next prime is 255413. The reversal of 255390 is 93552.

255390 = 224² + 225² + ... + 228².

It is a d-powerful number, because it can be written as 2⁵ + 5 + 3¹¹ + 5⁷ + 9² + 0 .

It is a self number, because there is not a number n which added to its sum of digits gives 255390.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 255390.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4227 + ... + 4286.

It is an arithmetic number, because the mean of its divisors is an integer number (38313).

2²⁵⁵³⁹⁰ is an apocalyptic number.

255390 is an abundant number, since it is smaller than the sum of its proper divisors (357618).

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

255390 is a wasteful number, since it uses less digits than its factorization.

255390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8523.

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

The square root of 255390 is about 505.3612569242. The cubic root of 255390 is about 63.4455689139.

The spelling of 255390 in words is "two hundred fifty-five thousand, three hundred ninety".