243940608 has 108 divisors (see below), whose sum is σ = 707878080. Its totient is φ = 80790528.

The previous prime is 243940603. The next prime is 243940637. The reversal of 243940608 is 806049342.

It is a happy number.

243940608 is a `hidden beast` number, since 2 + 4 + 3 + 9 + 40 + 608 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243940603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550435 + ... + 550877.

Almost surely, 2^243940608 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 243940608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353939040).

243940608 is an abundant number, since it is smaller than the sum of its proper divisors (463937472).

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

243940608 is a wasteful number, since it uses less digits than its factorization.

243940608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 243940608 is about 15618.5981445199. The cubic root of 243940608 is about 624.8292721941.

The spelling of 243940608 in words is "two hundred forty-three million, nine hundred forty thousand, six hundred eight".