243403433240 has 64 divisors (see below), whose sum is σ = 597820620960. Its totient is φ = 88454661120.

The previous prime is 243403433227. The next prime is 243403433267. The reversal of 243403433240 is 42334304342.

It is a junction number, because it is equal to n+sod(n) for n = 243403433197 and 243403433206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529484 + ... + 875876.

Almost surely, 2^243403433240 is an apocalyptic number.

243403433240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243403433240 is an abundant number, since it is smaller than the sum of its proper divisors (354417187720).

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

243403433240 is a wasteful number, since it uses less digits than its factorization.

243403433240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348012 (or 348008 counting only the distinct ones).

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

Adding to 243403433240 its reverse (42334304342), we get a palindrome (285737737582).

The spelling of 243403433240 in words is "two hundred forty-three billion, four hundred three million, four hundred thirty-three thousand, two hundred forty".