243433230040 has 512 divisors, whose sum is σ = 792228003840. Its totient is φ = 64824883200.

The previous prime is 243433230031. The next prime is 243433230059. The reversal of 243433230040 is 40032334342.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 243433229990 and 243433230008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 28544257 + ... + 28552783.

It is an arithmetic number, because the mean of its divisors is an integer number (1547320320).

Almost surely, 2^243433230040 is an apocalyptic number.

243433230040 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 243433230040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396114001920).

243433230040 is an abundant number, since it is smaller than the sum of its proper divisors (548794773800).

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

243433230040 is a wasteful number, since it uses less digits than its factorization.

243433230040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8623 (or 8619 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 28.

Adding to 243433230040 its reverse (40032334342), we get a palindrome (283465564382).

The spelling of 243433230040 in words is "two hundred forty-three billion, four hundred thirty-three million, two hundred thirty thousand, forty".