243168840 has 192 divisors, whose sum is σ = 845020800. Its totient is φ = 60466176.

The previous prime is 243168829. The next prime is 243168841. The reversal of 243168840 is 48861342.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 243168795 and 243168804.

It is not an unprimeable number, because it can be changed into a prime (243168841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 499077 + ... + 499563.

It is an arithmetic number, because the mean of its divisors is an integer number (4401150).

Almost surely, 2^243168840 is an apocalyptic number.

243168840 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 243168840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422510400).

243168840 is an abundant number, since it is smaller than the sum of its proper divisors (601851960).

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

243168840 is a wasteful number, since it uses less digits than its factorization.

243168840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 243168840 is about 15593.8718732712. The cubic root of 243168840 is about 624.1696407609.

The spelling of 243168840 in words is "two hundred forty-three million, one hundred sixty-eight thousand, eight hundred forty".