243496240 has 40 divisors (see below), whose sum is σ = 609679728. Its totient is φ = 89905920.

The previous prime is 243496217. The next prime is 243496241. The reversal of 243496240 is 42694342.

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

It is a junction number, because it is equal to n+sod(n) for n = 243496196 and 243496205.

It is not an unprimeable number, because it can be changed into a prime (243496241) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 116026 + ... + 118105.

Almost surely, 2^243496240 is an apocalyptic number.

243496240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243496240 is an abundant number, since it is smaller than the sum of its proper divisors (366183488).

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

243496240 is a wasteful number, since it uses less digits than its factorization.

243496240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234157 (or 234151 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 243496240 is about 15604.3660556910. The cubic root of 243496240 is about 624.4496403090.

The spelling of 243496240 in words is "two hundred forty-three million, four hundred ninety-six thousand, two hundred forty".