243980208 has 80 divisors (see below), whose sum is σ = 705986560. Its totient is φ = 80668224.

The previous prime is 243980207. The next prime is 243980263. The reversal of 243980208 is 802089342.

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

It is not an unprimeable number, because it can be changed into a prime (243980207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52641 + ... + 57087.

It is an arithmetic number, because the mean of its divisors is an integer number (8824832).

Almost surely, 2^243980208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243980208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352993280).

243980208 is an abundant number, since it is smaller than the sum of its proper divisors (462006352).

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

243980208 is a wasteful number, since it uses less digits than its factorization.

243980208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4591 (or 4579 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 243980208 is about 15619.8658124838. The cubic root of 243980208 is about 624.8630808339.

The spelling of 243980208 in words is "two hundred forty-three million, nine hundred eighty thousand, two hundred eight".