243045240 has 32 divisors (see below), whose sum is σ = 729136080. Its totient is φ = 64812032.

The previous prime is 243045233. The next prime is 243045241. The reversal of 243045240 is 42540342.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 243045240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243045241) 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, 1012569 + ... + 1012808.

Almost surely, 2^243045240 is an apocalyptic number.

243045240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243045240 is an abundant number, since it is smaller than the sum of its proper divisors (486090840).

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

243045240 is a wasteful number, since it uses less digits than its factorization.

243045240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025391 (or 2025387 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 243045240 is about 15589.9082742651. The cubic root of 243045240 is about 624.0638700238.

Adding to 243045240 its reverse (42540342), we get a palindrome (285585582).

The spelling of 243045240 in words is "two hundred forty-three million, forty-five thousand, two hundred forty".