243423332240 has 40 divisors (see below), whose sum is σ = 617410090368. Its totient is φ = 88517575040.

The previous prime is 243423332209. The next prime is 243423332249. The reversal of 243423332240 is 42233324342.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 243423332197 and 243423332206.

It is not an unprimeable number, because it can be changed into a prime (243423332249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138307832 + ... + 138309591.

Almost surely, 2^243423332240 is an apocalyptic number.

243423332240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243423332240 is an abundant number, since it is smaller than the sum of its proper divisors (373986758128).

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

243423332240 is a wasteful number, since it uses less digits than its factorization.

243423332240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276617447 (or 276617441 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 32.

Adding to 243423332240 its reverse (42233324342), we get a palindrome (285656656582).

The spelling of 243423332240 in words is "two hundred forty-three billion, four hundred twenty-three million, three hundred thirty-two thousand, two hundred forty".