243784650 has 48 divisors (see below), whose sum is σ = 609050304. Its totient is φ = 64529280.

The previous prime is 243784633. The next prime is 243784657. The reversal of 243784650 is 56487342.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 243784599 and 243784608.

It is not an unprimeable number, because it can be changed into a prime (243784657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14619 + ... + 26481.

It is an arithmetic number, because the mean of its divisors is an integer number (12688548).

Almost surely, 2^243784650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243784650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304525152).

243784650 is an abundant number, since it is smaller than the sum of its proper divisors (365265654).

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

243784650 is a wasteful number, since it uses less digits than its factorization.

243784650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12015 (or 12010 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The square root of 243784650 is about 15613.6046446681. The cubic root of 243784650 is about 624.6960869096.

The spelling of 243784650 in words is "two hundred forty-three million, seven hundred eighty-four thousand, six hundred fifty".