243345340 has 48 divisors (see below), whose sum is σ = 592768512. Its totient is φ = 82184256.

The previous prime is 243345317. The next prime is 243345353. The reversal of 243345340 is 43543342.

243345340 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 243345299 and 243345308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3592 + ... + 22351.

It is an arithmetic number, because the mean of its divisors is an integer number (12349344).

Almost surely, 2^243345340 is an apocalyptic number.

243345340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243345340 is an abundant number, since it is smaller than the sum of its proper divisors (349423172).

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

243345340 is a wasteful number, since it uses less digits than its factorization.

243345340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26026 (or 26024 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 28.

The square root of 243345340 is about 15599.5301211286. The cubic root of 243345340 is about 624.3206185730.

Adding to 243345340 its reverse (43543342), we get a palindrome (286888682).

The spelling of 243345340 in words is "two hundred forty-three million, three hundred forty-five thousand, three hundred forty".