243044040 has 32 divisors (see below), whose sum is σ = 729132480. Its totient is φ = 64811712.

The previous prime is 243044033. The next prime is 243044057. The reversal of 243044040 is 40440342.

It is a junction number, because it is equal to n+sod(n) for n = 243043998 and 243044016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012564 + ... + 1012803.

It is an arithmetic number, because the mean of its divisors is an integer number (22785390).

Almost surely, 2^243044040 is an apocalyptic number.

243044040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243044040 is an abundant number, since it is smaller than the sum of its proper divisors (486088440).

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

243044040 is a wasteful number, since it uses less digits than its factorization.

243044040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025381 (or 2025377 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 243044040 is about 15589.8697877821. The cubic root of 243044040 is about 624.0628429477.

Adding to 243044040 its reverse (40440342), we get a palindrome (283484382).

The spelling of 243044040 in words is "two hundred forty-three million, forty-four thousand, forty".