240440644 has 6 divisors (see below), whose sum is σ = 420771134. Its totient is φ = 120220320.

The previous prime is 240440621. The next prime is 240440647. The reversal of 240440644 is 446044042.

It can be written as a sum of positive squares in only one way, i.e., 239878144 + 562500 = 15488^2 + 750^2 .

It is not an unprimeable number, because it can be changed into a prime (240440647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30055077 + ... + 30055084.

Almost surely, 2^240440644 is an apocalyptic number.

It is an amenable number.

240440644 is a deficient number, since it is larger than the sum of its proper divisors (180330490).

240440644 is a wasteful number, since it uses less digits than its factorization.

240440644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60110165 (or 60110163 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

The square root of 240440644 is about 15506.1485869316. The cubic root of 240440644 is about 621.8265973758.

Adding to 240440644 its reverse (446044042), we get a palindrome (686484686).

The spelling of 240440644 in words is "two hundred forty million, four hundred forty thousand, six hundred forty-four".