243248240 has 40 divisors (see below), whose sum is σ = 598823280. Its totient is φ = 91575296.

The previous prime is 243248237. The next prime is 243248261. The reversal of 243248240 is 42842342.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88070 + ... + 90789.

It is an arithmetic number, because the mean of its divisors is an integer number (14970582).

Almost surely, 2^243248240 is an apocalyptic number.

243248240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243248240 is an abundant number, since it is smaller than the sum of its proper divisors (355575040).

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

243248240 is a wasteful number, since it uses less digits than its factorization.

243248240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178889 (or 178883 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

The square root of 243248240 is about 15596.4175373706. The cubic root of 243248240 is about 624.2375684285.

The spelling of 243248240 in words is "two hundred forty-three million, two hundred forty-eight thousand, two hundred forty".