243104240 has 40 divisors (see below), whose sum is σ = 594969360. Its totient is φ = 92123136.

The previous prime is 243104237. The next prime is 243104243. The reversal of 243104240 is 42401342.

It is an interprime number because it is at equal distance from previous prime (243104237) and next prime (243104243).

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243104243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78449 + ... + 81488.

It is an arithmetic number, because the mean of its divisors is an integer number (14874234).

Almost surely, 2^243104240 is an apocalyptic number.

243104240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243104240 is an abundant number, since it is smaller than the sum of its proper divisors (351865120).

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

243104240 is a wasteful number, since it uses less digits than its factorization.

243104240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159969 (or 159963 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 243104240 is about 15591.8004091894. The cubic root of 243104240 is about 624.1143637636.

Adding to 243104240 its reverse (42401342), we get a palindrome (285505582).

The spelling of 243104240 in words is "two hundred forty-three million, one hundred four thousand, two hundred forty".