243232240 has 40 divisors (see below), whose sum is σ = 571133088. Its totient is φ = 96326400.

The previous prime is 243232229. The next prime is 243232259. The reversal of 243232240 is 42232342.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6972 + ... + 23131.

Almost surely, 2^243232240 is an apocalyptic number.

243232240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243232240 is an abundant number, since it is smaller than the sum of its proper divisors (327900848).

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

243232240 is a wasteful number, since it uses less digits than its factorization.

243232240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30217 (or 30211 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 243232240 is about 15595.9045906289. The cubic root of 243232240 is about 624.2238814229.

Adding to 243232240 its reverse (42232342), we get a palindrome (285464582).

The spelling of 243232240 in words is "two hundred forty-three million, two hundred thirty-two thousand, two hundred forty".