243309910428 has 144 divisors (see below), whose sum is σ = 705095193600. Its totient is φ = 72449432640.

The previous prime is 243309910427. The next prime is 243309910451. The reversal of 243309910428 is 824019903342.

243309910428 is a `hidden beast` number, since 2 + 433 + 0 + 99 + 104 + 28 = 666.

243309910428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243309910427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 350803 + ... + 780821.

It is an arithmetic number, because the mean of its divisors is an integer number (4896494400).

Almost surely, 2^243309910428 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 243309910428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352547596800).

243309910428 is an abundant number, since it is smaller than the sum of its proper divisors (461785283172).

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

243309910428 is a wasteful number, since it uses less digits than its factorization.

243309910428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430089 (or 430068 counting only the distinct ones).

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

The spelling of 243309910428 in words is "two hundred forty-three billion, three hundred nine million, nine hundred ten thousand, four hundred twenty-eight".