243124040340 has 144 divisors (see below), whose sum is σ = 755111343168. Its totient is φ = 63299884032.

The previous prime is 243124040317. The next prime is 243124040353. The reversal of 243124040340 is 43040421342.

It is a happy number.

243124040340 is a `hidden beast` number, since 2 + 4 + 312 + 4 + 0 + 4 + 0 + 340 = 666.

It is a super-3 number, since 3×243124040340³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1273579 + ... + 1451981.

It is an arithmetic number, because the mean of its divisors is an integer number (5243828772).

Almost surely, 2^243124040340 is an apocalyptic number.

243124040340 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 243124040340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377555671584).

243124040340 is an abundant number, since it is smaller than the sum of its proper divisors (511987302828).

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

243124040340 is a wasteful number, since it uses less digits than its factorization.

243124040340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178598 (or 178593 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 243124040340 its reverse (43040421342), we get a palindrome (286164461682).

The spelling of 243124040340 in words is "two hundred forty-three billion, one hundred twenty-four million, forty thousand, three hundred forty".