243943812 has 336 divisors, whose sum is σ = 837325440. Its totient is φ = 60466176.

The previous prime is 243943801. The next prime is 243943823. The reversal of 243943812 is 218349342.

It is an interprime number because it is at equal distance from previous prime (243943801) and next prime (243943823).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 5.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 6593058 + ... + 6593094.

It is an arithmetic number, because the mean of its divisors is an integer number (2492040).

Almost surely, 2^243943812 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 243943812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418662720).

243943812 is an abundant number, since it is smaller than the sum of its proper divisors (593381628).

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

243943812 is a wasteful number, since it uses less digits than its factorization.

243943812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 85 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 243943812 is about 15618.7007142080. The cubic root of 243943812 is about 624.8320077565.

It can be divided in two parts, 24 and 3943812, that added together give a triangular number (3943836 = T₂₈₀₈).

The spelling of 243943812 in words is "two hundred forty-three million, nine hundred forty-three thousand, eight hundred twelve".