243996408 has 64 divisors (see below), whose sum is σ = 683020800. Its totient is φ = 80701920.

The previous prime is 243996407. The next prime is 243996421. The reversal of 243996408 is 804699342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243996407) 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, 23985 + ... + 32607.

It is an arithmetic number, because the mean of its divisors is an integer number (10672200).

Almost surely, 2^243996408 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 243996408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341510400).

243996408 is an abundant number, since it is smaller than the sum of its proper divisors (439024392).

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

243996408 is a wasteful number, since it uses less digits than its factorization.

243996408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8769 (or 8759 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 243996408 is about 15620.3843742720. The cubic root of 243996408 is about 624.8769105867.

The spelling of 243996408 in words is "two hundred forty-three million, nine hundred ninety-six thousand, four hundred eight".