243968984820 has 144 divisors (see below), whose sum is σ = 807811909632. Its totient is φ = 59107633920.

The previous prime is 243968984807. The next prime is 243968984849. The reversal of 243968984820 is 28489869342.

243968984820 is a `hidden beast` number, since 2 + 4 + 3 + 9 + 68 + 98 + 482 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3255694 + ... + 3329786.

It is an arithmetic number, because the mean of its divisors is an integer number (5609804928).

Almost surely, 2^243968984820 is an apocalyptic number.

243968984820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243968984820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403905954816).

243968984820 is an abundant number, since it is smaller than the sum of its proper divisors (563842924812).

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

243968984820 is a wasteful number, since it uses less digits than its factorization.

243968984820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75782 (or 75777 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 63.

The spelling of 243968984820 in words is "two hundred forty-three billion, nine hundred sixty-eight million, nine hundred eighty-four thousand, eight hundred twenty".