243261304 has 72 divisors (see below), whose sum is σ = 543246480. Its totient is φ = 101999040.

The previous prime is 243261299. The next prime is 243261311. The reversal of 243261304 is 403162342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 162849 + ... + 164335.

It is an arithmetic number, because the mean of its divisors is an integer number (7545090).

Almost surely, 2^243261304 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 243261304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271623240).

243261304 is an abundant number, since it is smaller than the sum of its proper divisors (299985176).

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

243261304 is a wasteful number, since it uses less digits than its factorization.

243261304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 243261304 is about 15596.8363458748. The cubic root of 243261304 is about 624.2487434235.

It can be divided in two parts, 2432 and 61304, that added together give a palindrome (63736).

The spelling of 243261304 in words is "two hundred forty-three million, two hundred sixty-one thousand, three hundred four".