243863620 has 144 divisors (see below), whose sum is σ = 692108928. Its totient is φ = 70087680.

The previous prime is 243863617. The next prime is 243863663. The reversal of 243863620 is 26368342.

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, 259792 + ... + 260728.

It is an arithmetic number, because the mean of its divisors is an integer number (4806312).

Almost surely, 2^243863620 is an apocalyptic number.

243863620 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 243863620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346054464).

243863620 is an abundant number, since it is smaller than the sum of its proper divisors (448245308).

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

243863620 is a wasteful number, since it uses less digits than its factorization.

243863620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 243863620 is about 15616.1333242259. The cubic root of 243863620 is about 624.7635329446.

The spelling of 243863620 in words is "two hundred forty-three million, eight hundred sixty-three thousand, six hundred twenty".