243700240 has 40 divisors (see below), whose sum is σ = 647547840. Its totient is φ = 83554176.

The previous prime is 243700211. The next prime is 243700283. The reversal of 243700240 is 42007342.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217030 + ... + 218149.

It is an arithmetic number, because the mean of its divisors is an integer number (16188696).

Almost surely, 2^243700240 is an apocalyptic number.

243700240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243700240 is an abundant number, since it is smaller than the sum of its proper divisors (403847600).

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

243700240 is a wasteful number, since it uses less digits than its factorization.

243700240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435199 (or 435193 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 243700240 is about 15610.9013192705. The cubic root of 243700240 is about 624.6239786180.

Adding to 243700240 its reverse (42007342), we get a palindrome (285707582).

The spelling of 243700240 in words is "two hundred forty-three million, seven hundred thousand, two hundred forty".