243344440 has 16 divisors (see below), whose sum is σ = 547525080. Its totient is φ = 97337760.

The previous prime is 243344417. The next prime is 243344441. The reversal of 243344440 is 44443342.

It is a junction number, because it is equal to n+sod(n) for n = 243344399 and 243344408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243344441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3041766 + ... + 3041845.

Almost surely, 2^243344440 is an apocalyptic number.

243344440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243344440 is an abundant number, since it is smaller than the sum of its proper divisors (304180640).

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

243344440 is a wasteful number, since it uses less digits than its factorization.

243344440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6083622 (or 6083618 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

The square root of 243344440 is about 15599.5012740792. The cubic root of 243344440 is about 624.3198488997.

Adding to 243344440 its reverse (44443342), we get a palindrome (287787782).

The spelling of 243344440 in words is "two hundred forty-three million, three hundred forty-four thousand, four hundred forty".