240256 has 16 divisors (see below), whose sum is σ = 478890. Its totient is φ = 120064.

The previous prime is 240209. The next prime is 240257. The reversal of 240256 is 652042.

It can be written as a sum of positive squares in only one way, i.e., 193600 + 46656 = 440^2 + 216^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a nialpdrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (240257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811 + ... + 1066.

2²⁴⁰²⁵⁶ is an apocalyptic number.

It is an amenable number.

240256 is a deficient number, since it is larger than the sum of its proper divisors (238634).

240256 is an equidigital number, since it uses as much as digits as its factorization.

240256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891 (or 1879 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 240256 is about 490.1591578253. The cubic root of 240256 is about 62.1667381430.

Adding to 240256 its reverse (652042), we get a palindrome (892298).

It can be divided in two parts, 240 and 256, that added together give a triangular number (496 = T₃₁).

The spelling of 240256 in words is "two hundred forty thousand, two hundred fifty-six".