240644 has 6 divisors (see below), whose sum is σ = 421134. Its totient is φ = 120320.

The previous prime is 240641. The next prime is 240659. The reversal of 240644 is 446042.

It can be written as a sum of positive squares in only one way, i.e., 238144 + 2500 = 488^2 + 50^2 .

It is not an unprimeable number, because it can be changed into a prime (240641) 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, 30077 + ... + 30084.

It is an arithmetic number, because the mean of its divisors is an integer number (70189).

2²⁴⁰⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

240644 is a deficient number, since it is larger than the sum of its proper divisors (180490).

240644 is a wasteful number, since it uses less digits than its factorization.

240644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60165 (or 60163 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 240644 is about 490.5547879697. The cubic root of 240644 is about 62.2001854125.

Adding to 240644 its reverse (446042), we get a palindrome (686686).

The spelling of 240644 in words is "two hundred forty thousand, six hundred forty-four".