243240336 has 120 divisors (see below), whose sum is σ = 703747616. Its totient is φ = 78382080.

The previous prime is 243240323. The next prime is 243240359. The reversal of 243240336 is 633042342.

It is a happy number.

243240336 is a `hidden beast` number, since 2 + 4 + 324 + 0 + 336 = 666.

It is a super-2 number, since 2×243240336² = 118331722114785792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1009176 + ... + 1009416.

Almost surely, 2^243240336 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 243240336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351873808).

243240336 is an abundant number, since it is smaller than the sum of its proper divisors (460507280).

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

243240336 is a wasteful number, since it uses less digits than its factorization.

243240336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 452 counting only the distinct ones).

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

The square root of 243240336 is about 15596.1641437887. The cubic root of 243240336 is about 624.2308071227.

Adding to 243240336 its reverse (633042342), we get a palindrome (876282678).

The spelling of 243240336 in words is "two hundred forty-three million, two hundred forty thousand, three hundred thirty-six".