243295240 has 16 divisors (see below), whose sum is σ = 547414380. Its totient is φ = 97318080.

The previous prime is 243295201. The next prime is 243295253. The reversal of 243295240 is 42592342.

It can be written as a sum of positive squares in 2 ways, for example, as 220997956 + 22297284 = 14866^2 + 4722^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3041151 + ... + 3041230.

Almost surely, 2^243295240 is an apocalyptic number.

243295240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243295240 is an abundant number, since it is smaller than the sum of its proper divisors (304119140).

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

243295240 is a wasteful number, since it uses less digits than its factorization.

243295240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6082392 (or 6082388 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 243295240 is about 15597.9242208699. The cubic root of 243295240 is about 624.2777705368.

The spelling of 243295240 in words is "two hundred forty-three million, two hundred ninety-five thousand, two hundred forty".