243394863876 has 96 divisors (see below), whose sum is σ = 639642931200. Its totient is φ = 80025472800.

The previous prime is 243394863871. The next prime is 243394863931. The reversal of 243394863876 is 678368493342.

243394863876 is a `hidden beast` number, since 2 + 43 + 39 + 486 + 3 + 87 + 6 = 666.

243394863876 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243394863876² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243394863871) 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 31 ways as a sum of consecutive naturals, for example, 8953561 + ... + 8980703.

It is an arithmetic number, because the mean of its divisors is an integer number (6662947200).

Almost surely, 2^243394863876 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 243394863876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319821465600).

243394863876 is an abundant number, since it is smaller than the sum of its proper divisors (396248067324).

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

243394863876 is a wasteful number, since it uses less digits than its factorization.

243394863876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28286 (or 28278 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 63.

The spelling of 243394863876 in words is "two hundred forty-three billion, three hundred ninety-four million, eight hundred sixty-three thousand, eight hundred seventy-six".