243879660 has 168 divisors, whose sum is σ = 787746960. Its totient is φ = 63358848.

The previous prime is 243879613. The next prime is 243879661. The reversal of 243879660 is 66978342.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (243879661) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 626746 + ... + 627134.

It is an arithmetic number, because the mean of its divisors is an integer number (4688970).

Almost surely, 2^243879660 is an apocalyptic number.

243879660 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 243879660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393873480).

243879660 is an abundant number, since it is smaller than the sum of its proper divisors (543867300).

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

243879660 is a wasteful number, since it uses less digits than its factorization.

243879660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 243879660 is about 15616.6468872162. The cubic root of 243879660 is about 624.7772304741. Note that the first 3 decimals are identical.

The spelling of 243879660 in words is "two hundred forty-three million, eight hundred seventy-nine thousand, six hundred sixty".