243440560 has 40 divisors (see below), whose sum is σ = 617456016. Its totient is φ = 88523520.

The previous prime is 243440557. The next prime is 243440567. The reversal of 243440560 is 65044342.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×243440560² = 118526612506227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243440567) 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 in 7 ways as a sum of consecutive naturals, for example, 137439 + ... + 139198.

Almost surely, 2^243440560 is an apocalyptic number.

243440560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243440560 is an abundant number, since it is smaller than the sum of its proper divisors (374015456).

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

243440560 is a wasteful number, since it uses less digits than its factorization.

243440560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276661 (or 276655 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 243440560 is about 15602.5818376319. The cubic root of 243440560 is about 624.4020392912.

The spelling of 243440560 in words is "two hundred forty-three million, four hundred forty thousand, five hundred sixty".