255664 has 30 divisors (see below), whose sum is σ = 540020. Its totient is φ = 116928.
The previous prime is 255659. The next prime is 255667. The reversal of 255664 is 466552.
255664 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
Its product of digits (7200) is a multiple of the sum of its prime divisors (50).
It is not an unprimeable number, because it can be changed into a prime (255667) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8802 + ... + 8830.
2255664 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 255664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270010).
255664 is an abundant number, since it is smaller than the sum of its proper divisors (284356).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
255664 is a wasteful number, since it uses less digits than its factorization.
255664 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 85 (or 50 counting only the distinct ones).
The product of its digits is 7200, while the sum is 28.
The square root of 255664 is about 505.6322774507. The cubic root of 255664 is about 63.4682503979.
It can be divided in two parts, 255 and 664, that added together give a palindrome (919).
The spelling of 255664 in words is "two hundred fifty-five thousand, six hundred sixty-four".
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