243420336 has 160 divisors (see below), whose sum is σ = 729606080. Its totient is φ = 77635584.

The previous prime is 243420329. The next prime is 243420337. The reversal of 243420336 is 633024342.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (243420337) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1550370 + ... + 1550526.

It is an arithmetic number, because the mean of its divisors is an integer number (4560038).

Almost surely, 2^243420336 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 243420336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (364803040).

243420336 is an abundant number, since it is smaller than the sum of its proper divisors (486185744).

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

243420336 is a wasteful number, since it uses less digits than its factorization.

243420336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

The square root of 243420336 is about 15601.9337263046. The cubic root of 243420336 is about 624.3847479292.

Adding to 243420336 its reverse (633024342), we get a palindrome (876444678).

The spelling of 243420336 in words is "two hundred forty-three million, four hundred twenty thousand, three hundred thirty-six".