243432574840 has 128 divisors (see below), whose sum is σ = 675324034560. Its totient is φ = 76904907264.

The previous prime is 243432574829. The next prime is 243432574841. The reversal of 243432574840 is 48475234342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243432574841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1989927 + ... + 2108713.

It is an arithmetic number, because the mean of its divisors is an integer number (5275969020).

Almost surely, 2^243432574840 is an apocalyptic number.

243432574840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243432574840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337662017280).

243432574840 is an abundant number, since it is smaller than the sum of its proper divisors (431891459720).

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

243432574840 is a wasteful number, since it uses less digits than its factorization.

243432574840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119381 (or 119377 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 46.

The spelling of 243432574840 in words is "two hundred forty-three billion, four hundred thirty-two million, five hundred seventy-four thousand, eight hundred forty".