240243140 has 12 divisors (see below), whose sum is σ = 504510636. Its totient is φ = 96097248.

The previous prime is 240243137. The next prime is 240243151. The reversal of 240243140 is 41342042.

It can be written as a sum of positive squares in 2 ways, for example, as 37920964 + 202322176 = 6158^2 + 14224^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 12012157 = 240243140 / (2 + 4 + 0 + 2 + 4 + 3 + 1 + 4 + 0).

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 6006059 + ... + 6006098.

It is an arithmetic number, because the mean of its divisors is an integer number (42042553).

Almost surely, 2^240243140 is an apocalyptic number.

240243140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240243140 is an abundant number, since it is smaller than the sum of its proper divisors (264267496).

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

240243140 is a wasteful number, since it uses less digits than its factorization.

240243140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12012166 (or 12012164 counting only the distinct ones).

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

The square root of 240243140 is about 15499.7787080977. The cubic root of 240243140 is about 621.6562893934.

Adding to 240243140 its reverse (41342042), we get a palindrome (281585182).

The spelling of 240243140 in words is "two hundred forty million, two hundred forty-three thousand, one hundred forty".