243900904 has 128 divisors (see below), whose sum is σ = 555206400. Its totient is φ = 99348480.

The previous prime is 243900883. The next prime is 243900941. The reversal of 243900904 is 409009342.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3435189 + ... + 3435259.

It is an arithmetic number, because the mean of its divisors is an integer number (4337550).

Almost surely, 2^243900904 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 243900904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277603200).

243900904 is an abundant number, since it is smaller than the sum of its proper divisors (311305496).

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

243900904 is a wasteful number, since it uses less digits than its factorization.

243900904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 243900904 is about 15617.3270440239. The cubic root of 243900904 is about 624.7953710905.

The spelling of 243900904 in words is "two hundred forty-three million, nine hundred thousand, nine hundred four".