243423132240 has 40 divisors (see below), whose sum is σ = 754611710688. Its totient is φ = 64912835200.

The previous prime is 243423132229. The next prime is 243423132269. The reversal of 243423132240 is 42231324342.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 243423132198 and 243423132207.

It is a congruent number.

It is an unprimeable number.

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, 507131286 + ... + 507131765.

Almost surely, 2^243423132240 is an apocalyptic number.

243423132240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243423132240 is an abundant number, since it is smaller than the sum of its proper divisors (511188578448).

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

243423132240 is a wasteful number, since it uses less digits than its factorization.

243423132240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014263067 (or 1014263061 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 243423132240 its reverse (42231324342), we get a palindrome (285654456582).

The spelling of 243423132240 in words is "two hundred forty-three billion, four hundred twenty-three million, one hundred thirty-two thousand, two hundred forty".