243449740 has 12 divisors (see below), whose sum is σ = 511244496. Its totient is φ = 97379888.

The previous prime is 243449683. The next prime is 243449749. The reversal of 243449740 is 47944342.

It is a self number, because there is not a number n which added to its sum of digits gives 243449740.

It is not an unprimeable number, because it can be changed into a prime (243449749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6086224 + ... + 6086263.

It is an arithmetic number, because the mean of its divisors is an integer number (42603708).

Almost surely, 2^243449740 is an apocalyptic number.

243449740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243449740 is an abundant number, since it is smaller than the sum of its proper divisors (267794756).

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

243449740 is a wasteful number, since it uses less digits than its factorization.

243449740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12172496 (or 12172494 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 243449740 is about 15602.8760169400. The cubic root of 243449740 is about 624.4098878035.

The spelling of 243449740 in words is "two hundred forty-three million, four hundred forty-nine thousand, seven hundred forty".