243335040 has 128 divisors (see below), whose sum is σ = 835380000. Its totient is φ = 59891712.

The previous prime is 243335021. The next prime is 243335069. The reversal of 243335040 is 40533342.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 243335040.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20086 + ... + 29834.

Almost surely, 2^243335040 is an apocalyptic number.

243335040 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 243335040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417690000).

243335040 is an abundant number, since it is smaller than the sum of its proper divisors (592044960).

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

243335040 is a wasteful number, since it uses less digits than its factorization.

243335040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9784 (or 9772 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 24.

The square root of 243335040 is about 15599.1999794861. The cubic root of 243335040 is about 624.3118099760.

Adding to 243335040 its reverse (40533342), we get a palindrome (283868382).

It can be divided in two parts, 2433 and 35040, that added together give a palindrome (37473).

The spelling of 243335040 in words is "two hundred forty-three million, three hundred thirty-five thousand, forty".